阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Pandas are 1. (easy) identified due to their black-and-white fur patterns, 2. we've never known what purpose their colorization serves. Now, the same team of researchers that figured out why zebras have their stripes (条)are suggesting an 3. (explain) for pandas’ unique markings.
Bamboo turns out to be the key to at least half 4. mystery. This plant isn't particu¬larly packed with nutrients, and that means pandas have to search for food in5. (difference) areas if they want to keep eating. Since they don't hibernate (冬眠)during the winter, 6. (find) bamboo in snowy climates means they need to mix in, thus the white fur on the face, neck, stomach and bottom. But since bamboo is 7. (they) primary food source, pandas often have to adventure into jungle-like areas, 8. their black legs come in¬to play, helping them to hide from enemies.
The markings on the panda's face—black ears and the black fur around the eyes—have nothing to do with bamboo and camouflage (伪装).The researchers suggest that the dark ears 9. (mean) to be frightening—"GRR! Stay away!"—while the circles around the eyes may be used 10. (identify) markers among pandas.
Two weeks of volunteer work lay ahead and my mood _______. I realized that good _______ and a trip to Spain would not be enough to make the _______ that I had hoped for. My volunteer service was in a shelter in Peru. I was where I wanted to be, but, without the communication _______ I needed.
One morning the founder of the shelter , Miguel Rodriguez , _______ the story of how, after the death of his baby, he started feeding and taking in _______ children. He eventually _______ his family, wealth, and life to setting up what is now a shelter for over 1,300 chil-dren. As he finished, I asked：''I can _______ how the walls, the food, and the facility came to be, but, how did you _______ the atmosphere of love, respect, and care among these children? ''
His response was simple：''Use the language of love. '' He ________ , ''The language of love is done with your eyes, your hands, and your smile. '' ''________ are not only for work. They are for hugging, holding, and ________ . Do this, and they may well ________ the example. ''
This simple statement carried ________. These children had communicated love, respect, and ________ to me and each other without a word being ________. These emotions, so ________ to convey, did not need translation at all.
For the remainder of my service, I was determined to worry less about my ________ of Spanish, and instead, focus on using the language of love. When I returned home, I ________ myself to use it more in my everyday life and to be mindful that being a(n) ________ is sometimes all the power that is needed.
1.A.mattered B.sunk C.disappeared D.rose
2.A.intention B.appreciation C.introduction D.application
3.A.decision B.arrangement C.impression D.difference
4.A.tools B.desire C.skills D.course
5.A.Changed B.heard C.shared D.reformed
6.A.unconscious B.careless C.dangerous D.homeless
7.A.committed B.dragged C.convinced D.compared
8.A.stress B.understand C.explore D.predict
9.A.support B.decorate C.recognize D.create
10.A.wondered B.explained C.imagined D.claimed
11.A.Lips B.Eyes C.Hands D.Cheeks
12.A.fighting B.performing C.kissing D.comforting
13.A.include B.follow C.analyze D.describe
14.A.weight B.signals C.reference D.limitations
15.A.wisdom B.advance C.warmth D.freedom
16.A.overlooked B.spoken C.mistaken D.prepared
17.A.simple B.important C.specific D.hard
18.A.lack B.practice C.demand D.record
19.A.challenged B.expected C.condemned D.questioned
20.A.angel B.talent C.example D.hero
Americans spend nearly 40 minutes a day cleaning their homes. Fortunately, you can re-gain those precious minutes with these genius cleaning tips that only the professionals know 1.!
Freshen up your garbage disposals (处理器)with some lemons.
With all the junk we throw into our garbage disposals, it's no wonder that they're real petri dishes (培养皿)with the awful smell to prove it. Thankfully, making them a whole lot cleaner is easy： Simply drop some cut lemons down your drain.2..
Make the bathtub clean with grapefruit and salt.
3.. So the next time you’re at the supermarket, make sure to throw an extra grapefruit into your cart—not for eating, but for cleaning. Just cut the fruit open and cover it in salt. The salt creates a special texture while the acid in the grapefruit will help break down stains.
4.
Research published in 2015 in Scientific Reports suggests that our coffee makers are an absolute hotbed of bacterial activity, which means that we might just be taking in some of that disgusting stuff along with our dark roast. 5.? A monthly vinegar wash should do it. Simply fill your coffee maker's reservoir with a few tablespoons of white vinegar mixed with water, run it once more with only water to remove any remaining vinegar smell.
A.What problem will be caused by the bacteria
B.This his fruit is the perfect solution to a dirty tub
C.So, how should you fight with all that bacteria
D.Clean out your coffee maker with some vinegar
E.Get ready to have your home look twice as spotless in half the time
F.These tricks can help you be more subjective and work more efficiently
G.As your disposals covers up those skins, it will start to smell fresh and great
According to a study published in the pre-print website bioRxiv, a team of Israeli scientists recorded tomato and tobacco plants producing sound frequencies which humans cannot hear in stressful situations—such as when they experienced a lack of water or their stems were cut. The team identified the sounds with microphones placed around 10 centimeters (around four inches) away from the plants, though the scientists say the noises could potentially be heard several feet away by some mammals and insects, such as mice.
Plants exposed to drought stress have been shown to experience cavitation (空化现象)— a process where air bubbles (气泡)form, expand and explode inside tissue that transports water. These explosions produce sound, but they have only ever been recorded using devices directly connected to the plants. The latest study, meanwhile, is the first to identify plants making sounds which can be detected over a distance. And the researchers say that cavitation could potentially be the source of these sounds.
The team detected the tomato plants made 35 sounds an hour on average when they were exposed to drought conditions, while the tobacco plants produced 11. When the stems of the plants were cut, the tomato plants made 25 sounds an hour on average and the tobacco plants produced 15. As a comparison, unstressed plants made less than one sound hour on aver-age, according to the study.
The team say that while they only tested tomato and tobacco. It's possible that other plants could also produce sounds, adding that the latest findings could have implications for agriculture. ''Plant sound emissions could offer a novel way for monitoring crops' water state—a question of vital importance in agriculture, '' the authors wrote in the study. ''More Precise irrigation can save up to 50 percent of the water consumption and increase the output, with dramatic economic implications. ''
''According to Anne Visscher from the Royal Botanic Gardens, Kew, in the U. K., the idea that the sounds could be used in precision agriculture is 'practical' though she urges caution regarding the Israeli team's suggestion that other animals could hear the sounds at a distance, '' New Scientist reported.
1.What do the Israeli scientists find about plants?
A.Stressed plants tend to lack water.
B.Some plants can understand humans' sounds.
C.Stressed plants can make more frequent sounds.
D.Some mammals and insects can communicate with plants.
2.What can we learn about cavitation?
A.It may contribute to the plants' sounds.
B.It may lead to plants experiencing drought.
C.It is determined by the number of air bubbles.
D.It was identified and recorded for the first time.
3.How many sounds do the tomato plants make per hour on average when cut?
A.11. B.15.
C.25. D.35.
4.What's Anne Visscher's attitude to applying the study to agriculture?
A.Supportive. B.Cautious.
C.Reserved. D.Opposed.
Given a wide range of available entertainment options and the way we consume information, visits to the library may seem like an old-fashioned entertainment. But according to a new Gallup poll (民意调査),Americans took more trips to the library than to the movie theater in 2019. The poll surveyed 1,025 adults throughout the United States who were asked how many times they participated in nine different leisure (休闲)activities, including visiting a library, watching a movie, or attending a sporting event. Library visits came out on top as the favorite, with those surveyed visiting an average of 10.5 times annually. Movies were second with respondents heading to the cinema an average of 5.3 times throughout the year. The zoo came in the last place with only 0.9 visits.
Although it’s not the only determining factor, cost appears to play a part. Activities at the bottom of the list such as theme parks and zoos are typically expensive. Libraries are free, as are many of their available services like Wi-Fi, in addition to the endless amounts of books. A Pew Research Center study indicated that although most people visit libraries to check out reading materials, 29% of surveyed Americans over the age of 16 use libraries for computers, Internet and public Wi-Fi.
People between ages 30-49 were most likely to engage in leisure activities, according to the Gallup poll. This was perhaps because of “their relative youth combined with mid-life stability” Gallup’s Justin McCarthy told Smithsonian. McCarthy also notes that libraries are typically visited most often by adults from low-income households and less often by adults from high-income households. In this poll, the youngest age group—those who are 18 to 29 years old—visited the library the most. This could be because college students are in that group.
Regardless of the reasons why people visit libraries, they’re far from outdated. Libraries have stood the test of time, which is good news for book lovers, those needing to drop in for Internet use, or anyone just looking for some quiet time. If there was ever any doubt that libraries would simply fade away, research suggests that they’re not going anywhere anytime soon.
1.Which activity ranks last according to the survey?
A.Going to a library.
B.Visiting the zoo.
C.Attending a sporting event.
D.Watching a movie in the theater.
2.What can be inferred from paragraph 2?
A.Age plays a key role in going to a library.
B.Teenagers go to libraries mainly for free Wi-Fi.
C.Theme parks and zoos are less favored among the young.
D.The majority of Americans visit libraries mainly for reading materials.
3.Who visit libraries most according to McCarthy?
A.Adults with high income.
B.People between ages 30-49.
C.The young at the age of 18 to 29.
D.Teenagers from low-income households.
4.What can be the best title for the text?
A.Why people love reading more than ever
B.We love movies, but we love libraries more
C.Reading in libraries makes you a better person
D.Why more young people go to libraries for free Wi-Fi
Anna Heusler and a group of cyclists were riding towards Adelaide on Friday when they spotted a koala sitting in the middle of the road. It wasn’t the first time that Heusler had seen koalas out and about on the roads while riding—but this koala’s reaction amazed her. ''We stopped the bikes to help the koala get off the road, otherwise it would get hit by cars. But the koala walked up to me very quickly. It was obviously very thirsty, '' Heusler told CNN.
''As I was giving it a drink from our water bottles, it climbed up onto my bike. I've never seen a koala move so quickly. They're usually not pet animals, they stay up in the trees and people admire them from afar. ''
''None of us have ever seen anything like it. We gave it as much as we could and then made sure it was off the road and back to safety. ''Heusler shared the adorable yet heartbreak-ing images to her blog, showing the koala drinking water from her bottle. ''Australian Koala Bears suffered severe thirst in a heatwave. This koala walked right up to me as I was going down and climbed up onto my bike while I gave it water, '' she captioned the image. The video has since gone viral online, ranking top of millions of views on social media around the world. ''There's nothing but tragedy in Australia. It's burning out of control'' Heusler said. ''I hope this incident helps spread awareness. ''
Severe fires in the Adelaide Hills have burned 25,000 hectares of land，leaving koalas searching for food and water hard. Adelaide Koala Rescue's Jane Brister is currently caring for 46 koalas that have had their homes destroyed. She said the centre doesn’t normally care for this many koalas at once and the increase was due to the fires. ''A big problem we’ re noticing now is that koalas are coming in starving… there's just no food, '' Ms Brister said. Koalas eat eucalyptus (桉树)leaves—but thousands of trees have been destroyed by fires. Firefighters now across the country are taking time to care for wildlife when they find them before handing them to the correct authorities.
1.How did the koala surprise Heusler during her trip?
A.It approached her for the water.
B.It arried its baby to beg for her help.
C.It sat still in the middle of the road.
D.It was hit seriously by a car.
2.What can we know about koalas from paragraph 2?
A.They usually walk fast.
B.They are highly social animals.
C.They often rely on people to survive.
D.They usually don't stay close to humans.
3.Why did Heusler post the koala pictures online?
A.To spread people's awareness of the fire.
B.To stress the worsening climate change.
C.To remind people of the naughty koala.
D.To get more likes online.
4.What does Jane Brister's work focus on now?
A.Putting out the forest fire.
B.Looking for koala babies.
C.Protecting the endangered trees.
D.Looking after starving koalas.
