此题中的三题都是细节理解题。解题关键是首先要根据题干准确定位信息句,其次要对信息句进行准确的理解和判断,此题的三小题均为一一对应型,只要找准信息句,一一对应即可得出答案。而第二小题也可以用排除法,如文章第三段At Space Camp, trainees can earn their Space Exploration badge as they build and fire model rockets, learn about space tasks and try simulated(模拟) flying to space with the crew from all over the world.提到,要想获得太空探险徽章需要建造和发射火箭模型,学习空间任务,尝试与飞行员模拟太空飞行等,选项ABC都是歪曲事实,所以只有D正确。
C
Plastic-Eating Worms
Humans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场), and up to 12 million tons pollute the oceans. So far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms.
Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms’ chewing alone was not responsible for the polyethylene breakdown, the researchers made some worms into paste(糊状物) and applied it to plastic films. 14 hours later the films had lost 13% of their mass — apparently broken down by enzymes (酶) from the worms’ stomachs. Their findings were published in Current Biology in 2017.
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