Do you know why different animals or pests (昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees.
Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.
【小题1】From the passage we learn that locusts________.
A.are small animals | B.are easily found by birds |
C.are dangerous to their enemies | D.change their colors to protect themselves |
A.They run away quickly. | B.They have the colors much like their enemies. |
C.They hide themselves by day and appear at night. | D.They have to move quietly. |
A.they have the colors much like the trees | B.they move quietly |
C.they like brown and gray colors | D.they live in forests |
A.Because it is very and strong. |
B.Because the liquid it sends out can help it escape from its enemies. |
C.Because the liquid it sends out can kill its enemies. |
D.Because it swims faster than any other fish. |
A.The Change of Colors for Animals and Pests | B.Colors of Different Animals and Pests |
C.The Main Use of Colors for Animals and Pests | D.Some Animals and Pests |
【小题1】D
【小题1】C
【小题1】A
【小题1】B
【小题1】C
解析【小题1】根据It is because locusts change their colors together with the change of the colors of crops(庄稼).描述,可知选D。
【小题1】根据Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.描述,可知选C。
【小题1】根据Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees.描述,可知选A。
【小题1】根据A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. 描述,可知选B。
【小题1】通过阅读短文,可知本文主要介绍了动物和昆虫是如何通过颜色来保护自己的,故选C,颜色对于动物和昆虫的主要用途。
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