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Do you know why different animals or pests have their special colours? Colours in them seem to be used mainly to protect themselves.
Some birds like eating locusts,but birds cannot easily catch them. Why? It is because locusts change their colours together with the change of the coloursof crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown colour as crops have. Some other pests with different colours 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 colours is protecting themselves. bears, lions and other animals move quietly through forests. They cannot be seen by hunters. This is because they have the colours much like the tree.
Have you ever noticed an even more strange act? A kind of fish in the sea can send out a kind of very black liquid when it faces danger. While the liquid spread over, the enemies cannot find it. And it immediately swims away. So it has lived up to now though it isn’t strong at all.
【小题1】From the passage we can learn that locusts      .

A.are small animals
B.are easily found by birds
C.are dangerous to their enemies
D.change their colours to protect themselves
【小题2】How can pests with different colours from plants keep out of danger?
A.They run away quickly.
B.Their colours are much like their enemies.
C.They hide themselves in the day and appear at night.
D.They have to move quietly.
【小题3】Bears and lions can keep safe because they      .
A.have the colours much like the trees
B.move quickly
C.like brown and grey colours
D.live in forests
【小题4】The kind of fish can live up to now because        .
A.it is very big and strong
B.the liquid it sends out can help it escape from its enemies
C.the liquid it sends out can kill its enemies
D.it swims faster than any other fish
【小题5】Which is the best title for this passage?
A.The Change of Colours for Animals and Pests
B.Colours of Different Animals and Pests
C.The Main Use of Colours for Animals and Pests
D.Some Animals and Pests

【小题1】D
【小题2】C
【小题3】A
【小题4】B
【小题5】C

解析试题分析:这篇短文主要介绍了为什么不同的动物或害虫有其特殊的颜色。它们的颜色主要用于保护他们自己。作者列举了蝗虫,狮子,鱼等动物说明这一观点。
【小题1】归纳理解题。根据短文第二段It is because locusts change their colours together with the change of the coloursof crops.描述可知蝗虫为了不让鸟捉住,会随着植物的颜色变化,故选D。
【小题2】细节理解题。根据第二段Some other pests with different colours from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night故选C.
【小题3】细节理解题。根据第三段This is because they have the colours much like the tree.故选A。
【小题4】细节理解题。根据第四段A kind of fish in the sea can send out a kind of very black liquid when it faces danger.故选B.
【小题5】标题归纳题。根据短文的大意可知动物或害虫的特殊颜色的用途,故选C.
考点:科普类短文阅读。

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