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Honeybee populations in the United States 1. (decrease) dramatically over the decades. And a new study suggests that a certain kind of pesticide could be making things 2. (bad).
The number of honeybees hasn’t changed much over the past few years, but the overall picture doesn’t look good for an insect that plays 3. important role in our food supply. Scientists don’t know for sure 4. this is happening. Pesticides and parasites (寄生虫) are the most suspected reasons, and a study recently published in the scientific journal. One suggests that neonicotinolds (烟碱类农药) ,types of pesticides that 5. (use) around the world, are incredibly poisonous to honeybees and other insects. Part of the reason for that is because these pesticides appear 6. (stick) around in the environment and stay dangerous for longer periods of time.
Though they’re deadly to insects, neonicotinolds are not considered dangerous to humans. An ongoing challenge 7. farmers is finding ways to keep other insects away while still 8. (protect ) bees. Pesticides may not discriminate between the insects they kill, though neonicotinolds maker says the chemical’s risk to bees is lower when it’s used properly. The U. S. Department of Agriculture says it’s 9. (likely) that there’s one magic 10. (solve) to the problem, but there are a number of organizations trying to help honeybees.
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Every new year of the last decade I set a personal challenge. My goal was 1. (grow) in new ways outside my day-to-day work running Facebook. These 2. (lead) me to learn Mandarin, code an AI assistant for my home, read more books, run a lot more, and get 3. (comfortable) with public speaking.
When I started these challenges, my life was almost all about building the Facebook website. Now there’s so much more to learn. At Facebook, we’re building lots of different apps and technology and we’re handling a lot more social 4. (responsible). And outside Facebook, I’m a father now and I love spending time with my family, working on our charity and improving at the sports and hobbies I 5. (pick) up over the past years.
This decade I’m going to take 6. longer term focus. Rather than having year-to-year challenges, I’ve tried to think about 7. the world and my life will be like in 2030 so I can make sure I’m focusing 8. those things. By then, if things go well, my daughter Max will be in high school. We’ll have the technology to feel 9. (true) present with another person no matter where they are, and scientific research will have helped cure 10. prevent enough diseases to increase our average life expectancy(平均寿命) by another 2.5 years.
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Recently, a little dog was playing out in its yard with its owner Henry 1. a baby koala jumped onto its back. The confused dog moved around, trying2. (get) rid of the animal, which was holding tightly onto its fur. Every time it thought it was successful, the smart koala found a way to climb back on again.
The gentle dog 3. (eventual) managed to get rid of the koala by rolling on its back, at which point the koala ran back into the trees in search of4. (it) real mom. Henry, who caught the entire scene on camera, says the koala, who lives in his backyard, is newly independent of its mother. He thinks it may have mistaken his friendly dog5. its parent.
Though often6. (refer) to as “bears”, koala are not a member of the Ursidae ( 熊 科 )family to 7. conventional bears belong. Instead, the animals, which can 8. (find) in Australia, are similar to kangaroos. Koala babies, which are blind when born, spend the first six months of their lives inside their mother’s bags and the next six 9. (hold) onto their backs or bellies. The animals depend only on leaves for their10.(survive), consuming as much as 2.5 pounds a day.
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The Chinese have a saying, "Firewood, rice, oil, salt, sauce, vinegar and tea are the seven 1. (necessity) lo begin a day." 2. tea is the last one on the list, we still can see 3. plays an important role in our daily life. For the Chinese, tea drinking and tasting are not the same. Tea drinking is for refreshment, while tea tasting 4. (carry) more cultural meaning. It stresses more about the ultimate goal, 5. (value) highly in Chinese culture: the 6. (harmony) unity of human beings with nature. Because of the fact that the fragrance of tea is not aggressive, tea is often compared to personal character. Its characteristics of being pleasant, low-keyed, and lasting 7. (associate) to a personal character as well as a friendship between gentlemen. Wherever you are,8. a cup of tea in hand, you can get closer to peace and relaxation. While 9. (enjoy) the green leaves in the cup, you will find fame, wealth and other earthly concerns are 10. (entire) far away. Tea is the symbol of elegance.
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In the long history of China, many things are more 1. (advance) than the rest of the world and liquor(酒) is one of them. In China, liquor brewed (酿造) from cereal grain has always been in the dominant position and liquor brewed from fruits accounts 2.a small proportion only. Therefore, to explore the origin of liquor is 3. (main) to explore the origin of liquor brewed from cereal grain.
The history of liquor 4. (date) back to the Shanggu period. In Shiji Yinbenji (Historical Records), there was some record about liquor:“King Zhou made a liquor pool and 5. (hang) meat like a forest, drinking all night long. ”In Shi Jing (The Book of Songs), there were some poems about liquor: “October is the time 6. ( harvest) the grain to make liquor and people use the liquor to celebrate the longevity of 7.senior”. Those records indicated that liquor had a history of at least five thousand years.
According to some archaeological evidence, there were dedicated liquor tools among the Neolithic(新石器时代) potteries unearthed in modern times, 8.showed that liquor brewing was rather popular in primitive society. After the Xia and Shang 9. (dynasty), there were more and more liquor-drinking vessels, 10. (indicate) that liquor drinking was prevalent at that time.
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Hong Kong–Zhuhai–Macau Bridge is one of the most challenging constructions of its kind as well as the world’s 1.(long) sea-crossing bridge. Its life span 2.(set) at 120 years. It3. (reported) can stand magnitude-8 earthquake, scale-16 typhoon as well as the collision with 4.300,000-ton ship. The bridge is the national key project featured with strategic significance, large involvement, highly difficult level of construction, long construction time, high 5. (require) on technical design and environmental protection, many participant parties, complex management and coordination. Due to the long distances6.the cities, the project is actually a series of bridges and tunnels,7.(connect) by artificial islands. British newspaper “The Guardian” named the mega-structure one of 8. (it) “seven wonders of the modern world.”
It will be the first new land transport link between the east and west coasts of the Pearl River. The bridge will benefit the economic development of the whole of the Delta and create a regional transport network,9.(improve) upon 10.is considered to be a weak land transport network currently in place.
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Today I spent time talking to an old friend about some of the 1.(choose) that we have made in our lives. We both agree that life has 2.(actual) been good to us. And we are very 3.(thank) for what we have been blessed with.
Today I would like you to think about your journey and where you see yourself in 4. next five years. Do you see that you have become exactly who you set out to be? I work on my goals because I am excited about that opportunity.
However, I do realize that sometimes life can get 5. the way of our goals. I remember when my friend 6.(decide) to buy her first home, she was ready and had everything 7.(prepare). But during that time her father died and she had to move home 8.(help) take care of her mother. Her goal was delayed, 9. she didn’t give it up completely. And that’s exactly the key to this all. In order to achieve your goals, you have to keep working on 10..
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Climate change is bad news for the world’s coral reefs. As global temperatures increase, the world’s glaciers melt, 1. (cause) sea levels and ocean temperatures to rise. These conditions have led to coral bleaching(白化) events, 2. the coral turns white and slowly dies, unable to survive in its changing environment.
Global sea levels 3.(expect) to rise about 1.5 feet by 2100, meaning coral reefs will be deeper underwater than they were 4.(previous)in. The deeper the coral, the less light it receives, and the less 5.(able) it has to make food. This has potential to change the entire ecosystems of reefs and the marine life they support.
But a new study from a team of 6.(researcher) at the National University of Singapore (NUS) provides a ray of hope. They studied nearly 3,000 corals from 124 species at two reefs off 7. coast of Singapore: Pulau Hantu and Raffles Lighthouse. The water where these reefs live is 8.(cloud), murky and thick with sediment(沉淀物).
The light reaches down about 26 feet, yet there are corals growing well 9. that level and below. They’ve adapted to surviving under the changing conditions. Researchers say it’s likely that these corals will survive sea-level rise, according to the findings 10.(publish) in the journal Marine Environmental Research.
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Today we know Antarctica as an extreme environment 1. (contain ) ice and snow. But new research provides evidence that the area was very different in the past, 2. was found inside a piece of Earth sediment (沉淀物) gathered by researchers 3. under the seafloor off the coast of Antarctica.
In the sediment, they 4. (find) forest soil estimated to be about 90 million years old and this would have been in the Cretaceous Period, when dinosaurs were the main land 5. (animal). Johann Klages, who was the lead writer of a study on the findings 6. (publish) in the journal Nature, said the sediment collection was from 7. depth of about 30 meters below the ocean floor. Klages said an examination showed that the material formed on land, not in the ocean.
The Earth has experienced in the past and is 8. (current ) undergoing today. The researchers said that the rainforest environment in Antarctica was especially surprising, because each year the area 9. (experience) a four-month polar night when there is no sunlight to fuel plant life. Klages said no ice sheets were present during the time, but 10. (season) snowfall was likely.
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A group of researchers and scientists from China and other countries are working together to help increase 1. (appreciate) of China’s ancient cultural heritage. They are recording and collecting digital images of cultural relics from the Magao Caves, 2. were a key stop along the Silk Road throughout China’s ancient history. Nearly 500,000 high-quality digital photographs 3. (produce) since the international project started in 1994.
The Magao Caves have long been 4. meeting point for different cultures. Today, the caves are just as international as they 5. (be) at the time when people travelled the Silk Road. Tourists from all over the world visit Dunhuang to see the caves, and the Getty Museum in Los Angeles has even reproduced a copy of the caves and paintings for people 6. (admire) in America.
By7. (share) so many digital photos over the Internet, the group hopes to promote even 8. (wide) interest around the world in China’s ancient history, culture, and traditions. They also hope to further educate people about the importance of safeguarding historic and cultural relics for future 9. (generation) to understand and appreciate. As one researcher who is working 10. the project explains, “Appreciating the cultural heritage is very important for international communication and understanding.”
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