We humans love to stare into our smart devices. We gaze for hours-about 10 hours and 39 minutes a day-at our computers, smartphones,tablets and televisions. Is all this staring bad for us? It might be mainly because as we stare at our devices we are exposing ourselves to blue light.
Blue light is a type of electromagnetic(电磁的) radiation with a very short wavelength that produces a high amount of energy. While it’s true that light can damage our eyes under certain circumstances, there’s no scientific evidence suggesting that blue light is harmful to our eyes. But many people still think it is, which is why blue-light-blocking glasses are so popular. So do the glasses work?
“Everyone is very concerned that blue light may be causing damage to the eye, but there’s no evidence that it may be causing serious damage,” Dr. Rahul Khurana, clinical spokesman for the American Academy of Ophthalmology,told Business Insider.
Blue light exposure is nothing new. In fact,the sun is the largest source of blue light. Moreover, blue light is also present in LED light. But if blue light isn’t harmful, then why are we constantly rubbing our eyes when we’re looking at our screens? The answer is eyestrain(眼疲劳): More than 60 percent of people experience eye problems associated with digital eyestrain. And blue light, it seems, isn’t the cause. Instead, our eyes are so strained because most of us blink less when we stare at our digital devices. So if eyestrain is the issue, blue-light-blocking glasses are probably of little use.
1.What do we know about blue light?
A.It is a kind of nuclear radiation.
B.It has the shortest wavelength.
C.It may come from electronic devices.
D.It consumes a great deal of energy.
2.What causes the popularity of blue-light-blocking glasses?
A.Evidence of their benefits to eyes.
B.Belief in blue light's harmful effect.
C.Widespread use of smart devices.
D.Scientific understanding of blue light.
3.What can be inferred from Paragraph 4?
A.Blue light exposure is hardly avoidable.
B.Eye problems are not easy to deal with.
C.Blue light may connect with tired eyes.
D.Rubbing eyes makes people strained.
4.According to the text, wearing blue-light-blocking glasses may be________.
A.tiring B.harmful
C.useless D.beneficial
Thirteen-year-old Madison Williams was studying in her bedroom when Leigh Williams, her mother, told her that a little boy fell into a septic tank(化粪池）and no one could reach him.
Madison and Leigh ran to a neighbor's yard, where they found the boy's worried mother and other adults surrounding the tank opening. It stuck out a few inches above the ground and was 11 inches in width-slightly wider than a basketball-with a hatch(盖子)that had been moved unnoticed. The two-year-old boy had slipped in and was drowning in four feet of waste water inside the eight-feet-deep tank.
Madison surveyed the situation. She was the only one who could fit through the small hole. Without hesitation, she told the adults, "Lower me in. Inside, the tank was dark, and the air was smelly . In the process , she jammed her left wrist against a hidden pole , injuring the muscles in her wrist so severely that the hand was left useless.
Rather than tending to her injury ,Madison tried to feel the underwater boy. Minutes went by before she saw the outline of his foot. Madison shot her good hand out and grasped the foot tightly "Pull me up!" she shouted. Then, ten minutes after Madison had entered the tank, she and the boy were lifted out.
But the boy wasn't out of trouble. He had lacked Oxygen long enough that he wasn't breathing. He was placed on his side, and an adult hit him hard on the back. It was only when Madison heard him cry that she knew he was all right . It took Madison longer to recover than the boy, who was taken to hospital and left hospital that same night .She, however, experienced months of painful treatment, for the injury that she had postponed tending was more severe, which, says neighbor Mary Holley, made the girl's actions all the more impressive.
1.What most likely caused the boy to fall into the septic tank?
A.The tank was very hard to be noticed.
B.The boy was curious about the unknown.
C.The hatch was not in the correct position.
D.The tank opening stood out on the ground.
2.Why did Madison take longer to recover?
A.The injury to her wrist became worse
B.She wasn't sent to hospital in time.
C.She paid all her attention to the boy.
D.Serious infection set in to her wound.
3.Which of the following can be used to best describe Madison?
A.Modest. B.Optimistic.
C.Courageous. D.Hard-working.
4.What is the text mainly about?
A.A lucky little boy. B.A terrible drowning accident.
C.A hidden septic tank. D.An admirable teen hero.
Aberdeen
Lying along the northeast coast, Aberdeen is bordered by Royal Deeside and Cairngorms National Park to the west and wonderful sea views to the east.
In Aberdeen you can feel the richness of the city’s history all around you, from the traditional Doric accent of local residents (居民) to the beautiful granite (花岗岩) buildings along the streets.
Impressive architecture
Aberdeen is well-known all over the globe because of its granite buildings and monuments. To the north of the city center, the stone streets and historic university buildings of Old Aberdeen are steeped (浸透) in history, while to the east — by the harbor — the fishing quarter is packed with tiny cottages and colorful gardens.
At the harbor
This is a city where you can walk from the city center to the harbor in minutes — and you have a high chance of seeing dolphins (海豚) playing in the waters when you get to the harbor.
The sandy beach is a must visit. Walk along the sands before stopping to enjoy an ice cream in the fresh sea air. You might spot people surfing in the water too.
Getting here
Aberdeen has fantastic transport links with the rest of the UK and Europe. Whether flying, taking the train, catching the ferry or driving, reaching the region is straightforward.
Getting around
Aberdeen city has an amazing public transport system, both day and night, although exploring the streets by foot is a great way to experience the atmosphere of this dynamic city. Driving around is easy, but if you don’t have a car, buses and trains will easily take you to your destination.
1.Where does Aberdeen lie?
A.Far off the coast.
B.To the west of the sea.
C.To the west of Royal Deeside.
D.In the heart of Cairngorms National Park.
2.What makes Aberdeen famous worldwide?
A.Its richness of history and culture.
B.Its tiny cottages and colorful gardens.
C.Its granite buildings and monuments.
D.Its sandy beach and wonderful sea views.
3.What can be known about Aberdeen from the text?
A.It’s not easy to get around it by car.
B.Dolphins aren't rarely seen in its harbor.
C.The best way to enjoy it is taking public transport.
D.It has few direct transport links to cities outside the UK.
Directions: Write an English composition in 120-150 words according to the instructions given below in Chinese.
某学校开放创新实验室引起网上热议。作为一名学生，你在网上发帖参与讨论。你的网帖须包括如下内容：
•介绍创新实验室的情况
•你对此项改革的看法
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Directions: Translate the following sentences into English, using the words given in the brackets.
1.影视剧中虚构的情节往往被误认为是真实生活。（mistake）
2.规定每位小提琴手都必须演奏一首中国作品以弘扬中华文化。（require）
3.被他的团队认可和接纳，他有了一种归属感。（sense）
4.留学生身处他们并不习惯的学习环境时产生焦虑是很自然的。（accustom）
Directions: Read the following passage. Summarize in no more than 60 words the main idea and the main point(s) of the passage. Use your own words as far as possible.
They like using the Internet. They have lots of pocket money to spend. And they spend a higher proportion of it online than the rest of us. Teenagers are just the sort of people an online seller is interested in, and the things they want to buy — games, CDs and clothing — are easily sold on the Web.
But paying online is a tricky business for consumers who are too young to own credit cards. Most have to use a parents card. They want a facility that allows them to spend money.
That may come sooner than they think: new ways to take pocket money into cyber space are coming out rapidly on both sides of the Atlantic. If successful, these products could stimulate online sales.
In general, teenagers spend huge amounts: $153 bn (billion) in the US last year and £20 bn annually in the UK. Most teenagers have access to the Internet at home or at school — 88 percent in the US, 69 percent in the UK. According to Jupiter Research, one in eight of those with Internet access has bought something online — mainly CDs and books.
In most cases, parents pay for these purchases with credit cards, an arrangement that is often unsatisfactory for them and their children. Pressing parents to spend online is less productive than pressing on the high street. They’re more likely to ask “Why” if you ask to spend some money online.
One way to help teenagers change notes and coins into cybercash is through prepaid cards such as IntenetCash in the US and Smart cards in the UK, Similar to those for pay-as-you-go mobile telephones, they are sold in amounts such as £20 or $50 with a concealed 14-digit number that can be used to load the cash into an online account.
