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四、阅读理解。
When it comes to endangered species（物种）, most of you may think of pandas. But did you know that bees are disappearing too? Years ago, the US Fish&Wildlife Service added seven bee species to the endangered species list. What if bees die out one day?
Just in case they do, Japanese scientists have created a mini drone（无人机）to pollinate plants, just like bees, reported CNN.
The drone has a piece of horsehair（马鬃）with gel（凝胶）on it. The gel lets the drone pick up and put down pollen grains（花粉粒）from flower to flower.
Scientists still need to improve the drone. It cannot make honey or work without human help. The cost of up to 100 per drone is also high.
However, it's still a meaningful exercise because pollination is important for human beings. Without pollinators, fruit and vegetable production will drop around the world, reported The Lancet, a UK magazine.
Bees are one of the most important pollinators. However, their numbers are dropping quickly. Bee numbers in the US have dropped greatly in the past five years, according to Global Research, a Canadian research organisation. The situation is similar in other countries.
Scientists are trying to find the causes. Here are several possible ones. First of all, more farmers are using pesticides（杀虫剂）. Besides, different illnesses have caused the deaths of many different species of bees. Finally, global warming has changed the bees' living environment.
( ) 20. What can we learn from Paragraph 1?
A. Pandas are popular animals.
B. Some bee species are dying out.
C. We need to protect pandas.
D. Humans' activities have made bees die out.
( ) 21. What can the mini drone do?
A. Make honey.
B. Work without help from humans.
C. Pollinate flowers.
D. Protect bees.
( ) 22. What is the main idea of Paragraph 7?
A. Why bees are important to plants.
B. What results there will be if bees die out.
C. How to improve the drone.
D. Why the number of bees is reducing.
( ) 23. We can read the passage in a _________.
A. holiday diary
B. science magazine
C. food poster
D. sports newspaper
When it comes to endangered species（物种）, most of you may think of pandas. But did you know that bees are disappearing too? Years ago, the US Fish&Wildlife Service added seven bee species to the endangered species list. What if bees die out one day?
Just in case they do, Japanese scientists have created a mini drone（无人机）to pollinate plants, just like bees, reported CNN.
The drone has a piece of horsehair（马鬃）with gel（凝胶）on it. The gel lets the drone pick up and put down pollen grains（花粉粒）from flower to flower.
Scientists still need to improve the drone. It cannot make honey or work without human help. The cost of up to 100 per drone is also high.
However, it's still a meaningful exercise because pollination is important for human beings. Without pollinators, fruit and vegetable production will drop around the world, reported The Lancet, a UK magazine.
Bees are one of the most important pollinators. However, their numbers are dropping quickly. Bee numbers in the US have dropped greatly in the past five years, according to Global Research, a Canadian research organisation. The situation is similar in other countries.
Scientists are trying to find the causes. Here are several possible ones. First of all, more farmers are using pesticides（杀虫剂）. Besides, different illnesses have caused the deaths of many different species of bees. Finally, global warming has changed the bees' living environment.
( ) 20. What can we learn from Paragraph 1?
A. Pandas are popular animals.
B. Some bee species are dying out.
C. We need to protect pandas.
D. Humans' activities have made bees die out.
( ) 21. What can the mini drone do?
A. Make honey.
B. Work without help from humans.
C. Pollinate flowers.
D. Protect bees.
( ) 22. What is the main idea of Paragraph 7?
A. Why bees are important to plants.
B. What results there will be if bees die out.
C. How to improve the drone.
D. Why the number of bees is reducing.
( ) 23. We can read the passage in a _________.
A. holiday diary
B. science magazine
C. food poster
D. sports newspaper
答案
20.B 21.C 22.D 23.B
解析
20. 第一段核心内容是除了大家熟知的熊猫，部分蜜蜂物种也濒临消失，美国相关部门已经将7种蜜蜂列入濒危物种名单。A选项只是段落引入的铺垫内容，并非核心信息；C选项第一段未提及要保护熊猫；D选项第一段没有说明是人类活动导致蜜蜂灭绝，因此选B。
21. 根据文章第二段可知，这款迷你无人机的作用是像蜜蜂一样给植物授粉；第四段明确说明它无法产蜜，也不能脱离人类的帮助工作，它的功能不是保护蜜蜂，因此选C。
22. 第七段首句点明科学家正在探寻蜜蜂数量快速下降的原因，随后依次列举了使用杀虫剂、疾病、全球变暖三个可能的诱因，对应主旨是解释蜜蜂数量减少的原因，因此选D。
23. 本文是关于濒危蜜蜂、人工授粉无人机的科普类文章，最可能出现在科学杂志上，不可能出现在假期日记、食物海报、体育报纸中，因此选B。
21. 根据文章第二段可知，这款迷你无人机的作用是像蜜蜂一样给植物授粉；第四段明确说明它无法产蜜，也不能脱离人类的帮助工作，它的功能不是保护蜜蜂，因此选C。
22. 第七段首句点明科学家正在探寻蜜蜂数量快速下降的原因，随后依次列举了使用杀虫剂、疾病、全球变暖三个可能的诱因，对应主旨是解释蜜蜂数量减少的原因，因此选D。
23. 本文是关于濒危蜜蜂、人工授粉无人机的科普类文章，最可能出现在科学杂志上，不可能出现在假期日记、食物海报、体育报纸中，因此选B。
