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This flu season in the U．S. began earlier than usual and started ________ in midNovember with an increase of influenza B. A.building up B.piling up C.rising up D.picking up
Fanny asked ________ made that oddlooking little cat so popular. A.what was it that B.wat was that C.what it was that D.what that was
—If you don't know how to deal with the problem, why not consult with Jim? —Good idea! ________ after all. A.Great minds think alike B.Two heads are better than one C.Every coin has two sides D.A bird in the hand is worth two in the bush
Our losses are incredibly small, viewed ________ what has been accomplished. A.in the case of B.in the interest of C.in the event of D.in the light of
Arriving too early to a dinner party could appear slightly rude if the host ________ their preparations. A.completes B.is completing C.completed D.has completed
Each road leads to Rome. If you can't get ________ you want to go by one road, just try another. A.what B.how C.which D.where
There is more to good health than the mere ________ of disease. Mental health is equally important. A.presence B.absence C.experience D.evidence
The pandemic has fundamentally altered consumer behavior and enterprise operations, ________ digital adoption and transformation a necessity. A.to make B.making C.having made D.made
To ________ Darwin and his idea，National Museum of Natural History in Washington created a special exhibit, showing respect for the genius. A.celebrate B.promote C.explore D.inspect
Without coconuts, most of the tropical islands in the South Pacific ________ uninhabitable for both animals and people. A.must have remained B.may have remained C.need have remained D.would have remained
In China, “mythical creatures” is used to describe troublesome schoolchildren ________ behaviors drive their parents crazy. A.whose B.when C.who D.of whom
阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。 During the winter of 1986 I was working in construction near Oakland，California. It is not unusual for construction workers’hands to become very painful during winter after working with concrete，wet wood，mud，etc. My hands were no exception that year. They were actually cracking(龟裂)open at the joints in the fingers and thumbs. So I was always conplaining about my hurting hands. I often wondered when my cracked hands would not be painful. Stopping work because of hurting hands is simply not possible in the construction industry. You grit your teeth(咬紧牙关)，keep working and finish the job—but do further damage to your hands in the process. The only break occurs on weekends. My co-workers and I used to comfort each other almost every day. The pain is similar to that of“paper cuts”occurring many times an hour. One morning I left for work at 5：00 a. m. to pour concrete and pulled into a gas station to fuel up. As I got out of my truck，I noticed a newspaper delivery van(有篷货车)and the driver struggling with bales(大捆)of daily newspapers. I took a second look and noticed that the man was born with arms that ended halfway down each forearm. I was amazed to see him doing a job that would otherwise require a very physically gifted person. Still，he was somewhat struggling with the large bales because his arms simply weren’t long enough to carry these bales. Instead he had to“pinch”the bales and lift them with his short and thick arms. Then I found he had difficulty tying his shoes although he had tried many times. I wondered how I could give him some help. Paragraph 1： On my way to the convenience store at the station，I stopped __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Paragraph 2： I came to a full stop and looked back at him as he was getting into his van. __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
假定你是李华，你市将举办留学生汉语演讲比赛，主题为“我眼中的中国”(China in my eyes)。请给在你校留学的Jonah写一封电子邮件。内容包括： 1. 演讲主题； 2. 比赛时间和地点； 3. 邀请他代表你校参加。 注意：1. 词数80左右； 2. 可适当增加细节，以使行文连贯。 ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
阅读下面短文，在空白处填入1个适当单词或括号内单词的正确形式。 Coronaviruses(冠状病毒)are a large family of viruses that cause disease in mammals and birds. Coronaviruses can cause illnesses that range 1. the common cold to many more severe illnesses. The 2. (new)identified virus，called COVID-19，is thought to have spread to humans from wild animals sold at a market in Wuhan，in 3.(centre)China’s Hubei Province. But it is now spreading between people. Chinese officials say 4. disease is able to spread from one person to another even before any actual signs appear，5. makes it especially hard to contain. Signs of some patients 6. (affect)by the disease have included fever，cough，shortness of breath and general breathing difficulities. In some more severe 7. (case)，the virus can cause pneumonia(肺炎). Some people report few or no signs，while others have gotten very sick or even died. There is no special 8.(treat)for the new coronavirus at present. However，many of its effects are treatable，as long as a patient is in fair health. Last week the US Centers for Disease Control also 9. (publish)prevention tips. It says：wash your hands for at least 20 seconds with soap and water；avoid 10. (touch)your face with unwashed hands；stay home when you are sick；clean objects and surfaces that are touched often.
Most people get rid of their leftover foods，but in Nigerian-born visual artist Haneefah Adam’s kitchen，they’re put to good use. Adam，28，is famous for _______ food in creative ways，using it to make portraits and other works of art. She has _______ been artistic. Her mother said she had a _______ for art. Now，she’s building a career out of changing food into art. “I do _______ portraits and also often sew and paint，but what _______ me the most is food art，”she says. Adam is inspired by _______ things，including life experiences and culture. She _______ everything around her as something that can be made into art. In 2016，she_______ the TechMeetsArtNG exhibition，which was _______ and funded by Samsung Nigeria and Rele Gallery. ________ the competition，my art was mostly random，and I was just recording food art on social media. But after winning，I started to think about ________making a living from food art，”she says. Winning the competition kick-started Adam’s ________ and her full-time job is now________art for food brands such as Maggi and Dangote Salt. “I want to ________ in more exhibitions. I currently live in Kwara，northern Nigeria；it is diffcult to ________in the country’s art scene from here，”she says. 1.A.distributing B.mixing C.presenting D.selling 2.A.always B.hardly C.never D.usually 3.A.dilemma B.reputation C.standard D.talent 4.A.alternative B.regular C.compulsory D.specific 5.A.excites B.puzzles C.rejects D.presses 6.A.artificial B.modest C.random D.visual 7.A.collects B.devotes C.inspects D.sees 8.A.competed B.held C.won D.performed 9.A.sponsored B.donated C.expanded D.possessed 10.A.After B.Since C.While D.Before 11.A.actively B.frequently C.mildly D.roughly 12.A.view B.space C.reward D.career 13.A.1earning B.creating C.advertising D.developing 14.A.give B.bring C.result D.participate 15.A.set an example B.have a try C.make a difference D.break a record
Fishing is a great family sport，and a fun summertime activity. 1.. If you have never fished before it can seem very complicated. Expert fishers know when and where to find certain fish and the best technique to catch each fish. Expert knowledge comes from years of experience.2.. As a beginner you will want to use a technique called“Bait(鱼饵)Fishing”. This type of fishing is probably the easiest technique for catching fish. You will need some basic fishing equipment，which you can get at almost any outdoor gear store. You will have to have a rod and fishing line，hooks，some bait and if you are planning on keeping the fish，you will need something to store the fish. The best way to learn how to fish is to learn from someone who already knows，so when planning your fishing trip，be sure to bring along someone who has fished before. 3.，you will need to decide where to go fishing. Probably for the first time you will want to go to a local lake，where the water is calm and there are plenty of fish. You should also try to research the different types of fish that live in the place you decide to fish，so you know what types of bait they like to eat and what you want to do with the fish once you have caught it. 4.，you probably want to clean the fish，then store it before continuing fishing. If you want to release the fish，be extra careful when removing the hook，so it doesn’t get hurt too badly，then gently hold the fish in the water and allow it to swim away out of your hands. 5. Take some time to learn from an expert and you will be able to catch all types of fish using a wide variety of methods. A.If you want to keep the fish B.After you have decided to go fishing C.Once your hook and bait is in the water D.Now you have a very basic understanding of fishing E.There are many different species of fish and types of fishing F.Here are a few simple and basic fishing tips to get you started G.At this point you will need to determine if you want to keep the fish
A new device works like a solar panel，except that it doesn’t harvest energy from the sun. It absorbs energy from the cold night sky. A prototype(原型)of the device produced enough electricity at night to power a small light bulb. A bigger version might one day light rooms or charge phones. It also could power electronics in remote or low-resource areas that lack electricity. The device makes use of the temperature difference between Earth and outer space. It then uses that difference to create electricity. As long as one side of it is cooler than the other，the generator can produce electricity. The cooler side faces the sky and is attached to an aluminum plate. That plate is sealed beneath a transparent cover and surrounded with insulation(隔热材料) to keep out heat. The bottom of the generator is attached to an exposed aluminum plate. That plate is warmed by the local air. At night，the top plate can get a couple of degrees Celsius cooler than the bottom of the generator. Researchers tested a 20-centimeter prototype one clear December night in Stanford，California. The generator produced up to about 25 milliwatts of power per square meter of device. That was enough power to light a small light-emitting diode，or LED bulb. Further improvements might increase its production to at least 500 milliwatts per square meter. To do that，the system might need more insulation around the cool top plate. The device also could help power remote weather stations or other environmental devices，says Aaswath Raman. He is a materials scientist who worked on the device at the University of California，Los Angeles. This may be useful in polar regions that don’t see sunlight for months at a time，Raman says. “If you have some low-power load and you need to power it through three months of darkness，this might be a way. ” 1.What can we know about the new device? A.It gains energy from the sun. B.It’s been widely used in life. C.It is cooler than a solar panel. D.It’ll be popular in special areas. 2.What does the author mainly talk about in Paragraph 3? A.Application fields of the device. B.The developing process of the device. C.The working principle of the device. D.Significant effects of the device. 3.How can the device produce more electricity? A.By putting more insulation around the top plate. B.By using it in extremely cold and clear nights. C.By attaching the bottom plate to a warm plate. D.By covering the top plate with a transparent lid. 4.What could be a suitable title for the text? A.A Device Using the Cold Night Sky to Produce Electricity B.A Device Bringing New Hope for Those in the Cold Night C.The Difference Between a Solar Panel and a New Device D.The Temperature Difference Between Earth and Outer Space
Sam is a fourth-year student at Harvard Medical School，but poetry is still a big part of his life，now with a new teacher，Rafael Campo，who believes poetry can benefit every doctor’s education and work. Rafael is a physician，professor and a highly respected poet. “Poetry is in every encounter(邂逅)with my patients. I think healing is really in a very great way about poetry. And if we do anything when we’re with our patients，we’re really immersing(使沉浸于)ourselves in their stories，really hearing their voices. And，certainly，that’s what a poem does，”he said. Rafael worries that something important has been lost in medicine and medical education today：humanity，which he finds in poetry. To end that，he leads a weekly reading and writing workshop for medical students and residents(住院医生). He thinks medical training focuses too much on distancing the doctor from his or her patients，and poems can help close that gap. Third-year resident Andrea Schwartz was one of the workshop regulars. She said. “I think there’s no other profession other than medicine that produces as many writers as it does. And I think that is because there’s just so much power in doctors and patients interacting when patients are at their saddest. ”Not everyone believes that’s what doctors should do，though. Rafael said，“I was afraid of how people might judge me，actually. In the medical profession，as many people know，we must always put the emergency first. But，you know，that kind of treatment，if it’s happening in the hospital，very regrettably，sadly，results in a bad outcome. The family is sitting by the bedside. The patient hasn’t survived the cancer. Don’t we still have a role as healers there?” In a poem titled“Health”，Rafael writes of the wish to live forever in a world made painless by our incurable joy. He says he will continue teaching students，helping patients and writing poems，his own brand of medicine. 1.What do we know about Rafael Campo? A.He works as a doctor. B.He is under medical care. C.He is a literature professor. D.He knows little about poetry. 2.What does the author try to show in Paragraph 2 ? A.The importance of medical training. B.The effect of poetry in medical treatment. C.The similarity involved in poetry and medical work. D.The present relationship between patients and doctors. 3.What does Andrea Schwaflz think of poetry? A.It comforts patients’family. B.It contributes to medical work. C.It has nothing to do with doctors. D.It keeps doctors away from patients. 4.What is Rafael Campo’s view on poetry? A.It requires a lot of spare time. B.It can provide a useful tool for doctors. C.It has little effect on patients’conditions. D.It should be included in emergency treatments.
When the young donkey Daisy May came to us，she was pregnant. With no donkey experience. I was unprepared for what might come next. After some difficulty，Daisy’s baby was born. I thought the poor thing was dead. I planned to put the loss behind us and make sure she never got pregnant again. Just then，I heard a little noise. I couldn’t believe that baby was breathing and looking at me!We called him Samson，and of course I became his mother as much as Daisy was. When Samson was nine months old，I had to separate Daisy and Samson for a few hours a day to wean(使断奶)him，but otherwise he went wherever she did. I think she would be lost without him. His donkey stepdad Bernard taught him to always be ready to have fun. They enjoy playing football together and going for a roll on a hot summer day. I asked a worker to make a harness(马具)for my three little donkeys. When I brought it home I taught them one by one how to pull a cart. Samson watched and freely followed Daisy. When he was three，I put the harnness on him and he knew exactly what to do. That was 15 years ago. Now，the most exciting thing about Samson is that he has become a little renowned. People come from all over to see him perform. The neighbors bring their grandchildren，and my sons bring their friends. Samson shakes hands，unties my shoe，picks up a hat and more. And when I ask him if he has any bad habits，he tries to pick my pocket!He surprisingly learned these tricks himself. I just ask him to do them and he understands. The relationship I have with my“baby”Samson has been an amazing experience. Every day is a fun day with this superstar donkey. 1.Why was the author at a loss for what might happen next at first? A.She wasn’t ready to be a mother. B.She never raised a donkey before. C.The donkey was pregnant by accident. D.The donkey gave birth to a dead baby. 2.What can we learn about Samson when he was little? A.He was surrounded by love. B.He was separated from his family. C.He was unwelcome to the neighbors. D.He was skilled in entertaining people. 3.Which of the following can best describe Samson? A.Friendly and courageous. B.Intelligent and lively. C.Carefree and creative. D.Patient and fortunate. 4.What does the underlined word“renowned”in Paragraph 5 probably refer to? A.Strange. B.Proud. C.Humorous. D.Famous.
Since it first opened after four years of construction in 1937 at a cost of $27 million，the Golden Gate Bridge has made its appearance in films and poetry. CNN Travel spent a day climbing into and ground the bridge，learning these secrets from the people who know and love it best. Why is it called the Golden Gate Bridge?It’s not golden. “The Golden Gate Bridge gets its name because it spans what is called the Golden Gate Strait，”said Paolo Cosulich-Schwartz，spokesman for the Golden Gate Bridge，Highway and Transportation District，which operates the bridge. It’s a three-mile-long and one-mile-wide body of water that connects the Pacific Ocean to the San Francisco Bay. What color is the bridge?It looks red. “It’s not red，although you’re not crazy to think so. Visitors all call it red，”said Russell. “Back in the day，the US Navy，then part of the War Department，oversaw the waterways and wanted to paint this bridge black and yellow for high visibility，”said fellow painter Jarrod Bauer. “They ended up mixing paint to create the color International Orange，which is similar to the color of red lead，”he said. Does the bridge get entirely painted every year? No，and it doesn’t need to be. It’s true that the top coat has been fully repainted over time with new and environmentally-improved International Orange top coats. Who performs bridge rescues? McVeigh and his fellow ironworkers，the so—called“Cowboys of the Sky”，have that responsibility. McVeigh has lost count of how many troubled souls he’s been called to rescue over the past 17 years. In September in 2018，the bridge started constructing a suicide(自杀)prevention system，also known as the safety net，to keep people from jumping off the Golden Gate Bridge. It’s expected to be completed in 2021. 1.What’s the true color of the Golden Gate Bridge? A.Red. B.Red lead. C.Black and yellow. D.International Orange. 2.Who can probably be called a hero on the Golden Gate Bridge? A.McVeigh. B.Jarrod Bauer. C.Russell. D.Paolo. 3.What can we know about the Golden Gate Bridge? A.It is safer now because of the safety net. B.It got its name because of its color. C.It took much time and money to be built. D.It needs to be repainted once a year.
请认真阅读下文信息，并按照要求用英语写一篇150词左右的文章。 China’s New Wildlife Trade Ban and Upcoming Law Amendment（修正案） March 05, 2020 “Lisa” Ning Hua The Coronavirus Outbreak in China, has been identified by the World Health Organization as a “Public Health Emergency of International Concern” or “PHEIC.” Seventeen years after the horrific SARS outbreak, the coronavirus has once again shown a spotlight on the risks of consuming wildlife as food and encouraged public outcry to ban wild meat consumption in China. This challenge is not unique to China. Epidemics, such as Ebola, Middle East Respiratory Syndrome, Bovine Spongiform Encephalopathy or Mad Cow Disease, Avian Influenza, and SARS, all originate from wildlife. To combat the outbreak, China announced a suspension on wildlife trade across the country in January and a crackdown (i.e., stricter enforcement) on illegal activities involving wildlife. The country’s top legislature also initiated a process for amending the current Wildlife Protection Law and announcing a decision this week to ban the trade of wildlife as food and tighten the crackdown on illegal wildlife trade. While this is all very good news, it should be noted that the ban is not permanent and will automatically expire（失效）when the amendments to the Wildlife Protection Law become effective. Further, key details regarding ban enforcement have yet to be clarified to ensure it serves its purpose. （写作内容） 1. 用约30个单词概述上述信息的主要内容； 2. 谈谈你如何看待保护野生动物，并说明理由（至少两点）。 （写作要求） 1. 写作过程中不能直接引用原文语句； 2. 作文中不能出现真实姓名和学校名称； 3. 不必写标题。 （评分标准） 内容完整，语言规范，语篇连贯，词数适当。 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。 注意：每个空格只填1个单词。请将答案写在答题卡上相应题号的横线上。 Why Do Smart People Do Foolish Things? We all probably know someone who is intelligent but does surprisingly stupid things. What does it mean to be smart or intelligent? Our everyday use of the term is meant to describe someone who is knowledgeable and makes wise decisions, but this definition is at odds with how intelligence is traditionally measured. The most widely known measure of intelligence is the intelligence quotient, more commonly known as the IQ test, which includes visuospatial puzzles, math problems, pattern recognition, vocabulary questions and visual searches. The advantages of being intelligent are undeniable. Intelligent people are more likely to get better grades and go farther in school. They are more likely to be successful at work. And they are less likely to get into trouble (for example, commit crimes) as adolescents. Given all the advantages of intelligence, though, you may be surprised to learn that it does not predict other life outcomes, such as well-being. You might imagine that doing well in school or at work might lead to greater life satisfaction, but several large-scale studies have failed to find evidence that IQ impacts life satisfaction or longevity (长寿). Most intelligence tests fail to assess the extent of rational thinking, such as real-world decision-making and our ability to interact well with others. This is, in other words, perhaps why “smart” people do “dumb” things. The ability to think critically, on the other hand, has been associated with wellness and longevity. Though often confused with intelligence, critical thinking is not intelligence. Critical thinking is a collection of cognitive (认知的) skills that allow us to think rationally (理性地) in a goal-orientated fashion and a disposition to use those skills when appropriate. Critical thinkers have self-confidence in their own abilities to reason. They possess great flexibility in requiring evidence to support their beliefs. Critical thinking means overcoming all kinds of cognitive biases (偏见). Critical thinking predicts a wide range of life events. Researchers have found that critical thinkers experience fewer negative life events such as academic (“I forgot about an exam”), health (“I received HIV through unprotected sex”), legal (“I was arrested for driving under the influence”), interpersonal (“I cheated on my partner for more than a year”), financial (“I have over $5,000 of credit-card debt”), and so on. Intelligence and improving intelligence are hot topics that receive a lot of attention. It is time for critical thinking to receive a little more of that attention. Reasoning and rationality more closely resemble what we mean when we say a person is smart rather than spatial skills and math ability. Furthermore, improving intelligence is difficult. Intelligence is largely determined by genetics. Critical thinking, though, can improve with training, and the benefits have been shown to continue over time. Anyone can improve their critical thinking skills. Doing so, we can say with certainty, is a smart thing to do.
As John George remembers it, the Detroit neighborhood he grew up in was straight out of Frank Capra's It's a Wonderful Life. ''We knew all our neighbors,'' George, 60, told Detroit's Metro Times. ''On Christmas Eve, we'd all go to midnight Mass, and there would be 300 people in our house at one o'clock to about five in the morning. The folks were just really good, hardworking people. '' By the 80s, however, the old neighborhood was more Pottersville than Bedford Falls. Due in part to economic downturns and a nationwide drug epidemic (泛滥), well-kept homes had been abandoned and kindly neighbors had fled to the suburbs. But not George. ''Living in any city, it's like being in a relationship,'' he told Reader's Digest. ''Some days are better than others. But it was my home. And when I saw it deteriorating, I had two choices: I could leave, or I could stay and fight. I decided to stay and fight. '' When the abandoned home behind his turned into a crack den, the father of two grabbed some plywood and nails and began boarding up the house. After two neighbors stopped to ask what he was doing, they decided to help, with great results. ''When the drug dealers came back, they turned around and went home,'' says George. ''That's how it all got started. '' ''It'' is Detroit Blight Busters, or DBB, an organization of civic-minded volunteers devoted to reviving the city they love, one abandoned house, one vacant lot, and one garbage-strewn park at a time. In the 30 years since that first home rescue, an army of approximately 182,000 volunteers, along with corporate and private donors, has helped George destroy around 300 abandoned homes, mostly in the poorer Northwest area of Detroit. They've also secured 400-some homes by boarding them up, thus keeping bad actors out. They've painted and renovated nearly 900 homes and built over 100 from scratch. According to Forbes, more than 1,000 Detroiters have been housed as a result of DBB's work. ''I'm half Lebanese, half Italian, and 100 percent Detroit stubborn, '' George told nationswell.com. ''Once we get something in our heart and in our head, it's almost autopilot. '' But that was only the beginning. In 2003, George also breathed life into a dilapidated (破旧的) square mile of Detroit by turning it into Artist Village, an area now filled with galleries, a performance space, community gardens, a coffee shop, and outdoor courtyards. Because this region of North Detroit was a food desert, George also persuaded a supermarket chain to move into the neighborhood. ''Blight is like a cancer: If you don't set upon it, it will spread,'' George told thehubdetroit.com. And then there's Halloween. In Detroit, October 30 was ruefully known as Devil's Night, a period when all hell would break loose in the form of crime and vandalism. In response, George created a citizens' patrol (巡逻队) that would take to the streets, keeping an eye on suspicious behavior. He called it Angels’ Night. What began with 12 neighbors on patrol in 1990 has grown to more than 60,000 citywide. George's inspired ideas have not gone unnoticed by the city he loves.''John wants to show that there is still something to Detroit. That it's still worth it,'' says real estate agent Robert LaBute. And others are buying into it.''We're seeing the trend of younger homeowners coming in.'' Is George proud of having boosted his once-ailing hometown? You'd better believe he is. As he puts it: ''We are on the front porch of the greatest urban comeback story in this nation’s history. '' 1.Why was John George reluctant to leave Detroit? A.He wanted to save his city. B.He enjoyed a wonderful life. C.He stayed to fight against drugs. D.He got along with his neighbors. 2.What was the result of the first home rescue? A.An official organization was founded. B.A voluntary movement began with it. C.A better neighbor relationship was formed. D.The drug dealers mended their ways at last. 3.The data provided in Paragraph 5 suggest that ______. A.many people have been lifted out of poverty B.many abandoned homes have been destroyed C.DBB has done a lot to bring the city back to life D.the number of the volunteers has been increasing 4.What did John George do to revive the city of Detroit ? A.He transformed the city into an industrial area. B.He created a citizen's patrol to prevent crimes. C.He expanded investment in real estate business. D.He built a supermarket chain in the neighborhood. 5.According to the passage, John George can be described as ______. A.cautious and creative B.stubborn and ambitious C.proud and self-centered D.strong-willed and inspiring 6.What's the best title for the passage? A.The Life of a Hero B.Detroit's Proud Tiger C.The Power of Devotion D.The Blooming of Detroit
Dec 21st 2018 On December 19th Gatwick airport, Britain’s second-biggest, was forced to close due to several sightings of drones（无人机）flying near its runways. The airport only reopened on the morning of December 21st. ① . The potential for an incident of this scale has been recognized for some years now. The falling price of small drones in recent years has resulted in the number flying dangerously near aircraft to rise sharply. ② . This is a threat that the authorities have to take seriously. Recent research suggests that small unmanned aerial vehicles (UAVs) can be much more damaging than birds — a surprisingly common cause of aircraft crashes — at the same impact speed, even if they are a similar weight. The researchers found that the drones’ rigid and dense materials—such as metal, plastic and lithium batteries—can put aero planes at much greater risk than a bird carcass（动物尸体）. If a drone were to hit an aircraft’s fan blades when it is operating at its highest speed, the blades could break and power to the engine could be lost. ③ . But it also underlined the potential for destruction that drones afford. The British police do not think that terrorism was the motivation behind the latest incident at Gatwick. According to the Daily Telegraph, a British newspaper, environmental activists are suspected of being behind the attack, which has happened before. As attention turns to what can be done to prevent a repeat, two solutions stand out. The first is regulation. Regulators in America and Britain already ban drones from flying too close to airports. America has introduced a compulsory registration scheme for drones and Britain plans to follow suit. But as the chaos at Gatwick shows, even serious punishments will not stop those intending to cause harm deliberately. ④ . Technology is the second, and more important, answer to the threat. In the US the FAA has experimented with a system. Drones can have pre-programmed software that keeps them away from prohibited areas, an approach known as “geofencing”. British engineers have come up with a system that catches drones with a net and then softly lands them with a parachute. Dutch police have even attempted to train eagles to catch drones in the sky and return them to their trainers as if they were song birds. The closure at Gatwick will give ideas such as these a mighty push forward. 1.Compared to birds, drones have become a more serious threat to airplane crash in that _____. A.drones are much heavier than birds in general B.drones usually fly even faster than birds C.drones will attack airplanes on purpose D.drones are made of rigid and dense materials 2.The sentence “The extended closure of Gatwick was a justified response to this threat.” should be put in _____. A.① B.② C.③ D.④ 3.It can be inferred from the article that _____. A.The decreasing size of drones recently has led to frequent accidents of this kind. B.Among the solutions, technology is considered to be a more reliable one. C.The FAA has adopted a “geofencing” system with the help of trained eagles. D.The British police think environmentalists conducted the latest incident at Gatwick. 4.What can be a suitable title for the article? A.Drones or birds, which is more harmful? B.How to stop unmanned aerial vehicles? C.Several drones close Gatwick airport. D.Drones have become a pressing issue.
The brain has a powerful ability to remember and connect events separated in time. And now, in that new study in mice published in Neuron, scientists at Columbia’s Zuckerman Institute have cast light on how the brain can form lasting links. The hippocampus—a small, seahorse-shaped region buried deep in the brain—is an important headquarters for learning and memory. Previous experiments in mice showed that disruption (中断) to the hippocampus leaves the animals with trouble learning to associate two events separated by tens of seconds. “The traditional view has been that cells in the hippocampus keep up a level of continuous activity to associate such events,” said Dr. Ahmed, co-first author of the study. “Turning these cells off would thus disrupt learning.” To test this view, the researchers imaged parts of the hippocampus of mice as the animals were exposed to two different stimuli (刺激物): a neutral (神经的) sound followed by a small but unpleasant puff of air. A fifteen-second delay separated the two events. The scientists repeated this experiment across several trials. Over time, the mice learned to associate the sound with the soon-to-follow puff of air. Using advanced microscopy, they recorded the activity of thousands of neurons (神经元) , a type of brain cell, in the animals’ hippocampus over the course of each trial for many days. “We expected to see continuous neural activity that lasted during the fifteen-second gap, an indication of the hippocampus at work linking the auditory sound and the air puff,” said computational neuroscientist Stefano Fusi, PhD. “But when we began to analyze the data, we saw no such activity.” Instead, the neural activity recorded during the fifteen-second time gap was sparse (稀少的). Only a small number of neurons worked, and they did so seemingly at random. To understand activity, they had to shift the way they analyzed data and use tools designed to make sense of random processes. Finally, the researchers discovered a complex pattern in the randomness: a style of mental computing that seems to be a remarkably efficient way that neurons store information. “We were happy to see that the brain doesn’t maintain ongoing activity over all these seconds because that’s not the most efficient way to store information,” said Dr. Ahmed. “The brain seems to have a more efficient way to build this bridge.” In addition to helping to map the circuitry involved in associative learning, these findings also provide a starting point to more deeply explore disorders, such as panic and post-traumatic stress disorder. 1.What can we learn about the hippocampus? A.It weakens with the memory decline. B.It is a brain region crucial for memory. C.It serves as a tool of learning languages. D.It is involved in the visual area of the brain. 2.The new study in mice indicates that ______. A.continuous activity happens as expected B.no neurons stay active at intervals of 15 seconds C.a complex pattern helps the brain learn associations D.neuronal information is stored in well-designed tools 3.From the last two paragraphs, we can infer that the findings ______. A.inspire deeper explorations of disorders B.provide evidence for language learning C.build a bridge between different parts of the brain D.help map some aspects of a person’s experiences
Keep the Summer Fun Going
Grand Ole Opry Package Experience some of Nashville’s most notable attractions with the Grand Ole Opry Package, a three-night getaway that includes lodging, a performance at the Grand Ole Opry, and a General Jackson Showboat Dinner Cruise.
Hersheypark Vacation Package The exciting Hersheypark Vacation Package includes two nights of lodging in the area in addition to tickets to Hersheypark, a recreational dream where visitors can ride exciting roller coasters and taste the delicious milk chocolate that the Hershey company is known for.
Branson's Fun for Kids Vacation Branson’s Fun for Kids Vacation includes four nights of lodging, admission to the Branson’s Wild World VIP Animal Adventure, Escape Mini Golf & Jungle Arcade, Hamners’ Unbelievable Family Variety Show, Fritz’s Adventure, a one day pass to Silver Dollar City and admission to the Dolly Parton’s Stampede!
SeaWorld San Antonio Vacation Package Dive into the deep sea excitement of SeaWorld with the SeaWorld San Antonio Vacation Package, which includes Three Day Flex Ticket and three nights’ lodging at your choice of hotels in the area. 1.If you are planning an exciting wild jungle adventure, which vacation package will you book? A.Grand Ole Opry Package. B.Hersheypark Vacation Package. C.Branson's Fun for Kids Vacation. D.SeaWorld San Antonio Vacation Package. 2.Hersheypark Vacation Package is attractive in that it includes ______. A.free accommodation B.various milk chocolates C.thrilling roller coaster rides D.amusing animal performances
From poverty to a rocket scientist to the CEO of the Girl Scouts (女童子军), Sylvia Acevedo’s story is inspiring. Sylvia Acevedo grew up on a dirt road in New Mexico. Her family was _______, living paycheck to paycheck. After an infectious disease _______in Las Cruces nearly killed her younger sister, her mother moved the family to a different _______. At her new school, a classmate _______her to become a Brownie Girl Scout. And from that moment, her life _______a new path. The Girl Scout cookie program equips girls with basic _______knowledge. Women constantly in the sector said they got their _______through it. Sylvia Acevedo was there going door-to-door _______ cookies to all her neighbors. There’s a famous sales _______ that her troop leader gave her: you never leave the side of a sale ________ you’ve heard “no” three times, and to this day she ________ by that. The Girl Scout experience in a way got girls ________. When they are earning different badges (徽章) , they have all those job skills that are ________related to what they’ve learned. On one camping trip, Acevedo’s troop leader saw her looking up at the ________—she didn’t know that there were planets. Her troop leader ________the Big Dipper, the Little Dipper and a few planets. Later, when the girls were ________ badges, Acevedo’s leader remembered her ________with the stars and suggested she try for her science badge. She went on to get a master’s in ________ from Stanford University, then became a rocket scientist with NASA, and then, in 2016, was appointed to ________ the Girl Scouts. What the Girl Scouts taught her was determination and resilience (适应力) and she has kept that ________in her life ever since. 1.A.large B.happy C.poor D.close 2.A.control B.outbreak C.symptom D.victim 3.A.project B.neighbourhood C.schoolyard D.division 4.A.convinced B.advised C.forced D.allowed 5.A.took up B.took in C.took off D.took on 6.A.political B.cultural C.financial D.religious 7.A.start B.way C.head D.vote 8.A.allocating B.selling C.making D.tasting 9.A.campaign B.figure C.program D.technique 10.A.after B.while C.until D.since 11.A.lives B.gets C.passes D.judges 12.A.adopted B.hired C.noticed D.supported 13.A.gradually B.hopefully C.closely D.loosely 14.A.trees B.birds C.stars D.tents 15.A.pointed out B.ruled out C.sorted out D.brought out 16.A.wearing B.donating C.counting D.earning 17.A.satisfaction B.association C.combination D.fascination 18.A.engineering B.marketing C.teaching D.nursing 19.A.back B.head C.fund D.check 20.A.dream B.promise C.lesson D.standard
Lisa complained it was _______, having to go upstairs to make the coffee every time. A.as clear as day B.a shot in the dark C.a pain in the neck D.as easy as pie
As a matter of fact, all people, ______they are young or old, are required to be citizens of high ideals, strict discipline, good education and communist morality. A.no matter B.however C.whatever D.whether
The Internet is one of the ways these feelings are conveyed and perhaps never before ______so much to connect different peoples and nations. A.did it serve B.it has served C.was it served D.has it served
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