Do you know why different animals or pests(害虫)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 colours of 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 colouring 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 spreads 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 |
A.have the colours much like the trees |
B.move quickly |
C.like brown and grey colours |
D.live in forests |
A.Because it is very strong. |
B.Because the liquid it sends out can help it get away 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 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】A
【小题3】B
【小题4】C
解析试题分析:短文大意不同的动物或昆虫有其特殊的颜色。它们的颜色似乎是主要用于保护自己不受敌人的侵害。
【小题1】细节理解题。根据第一段第二句Colours in them seem to be used mainly to protect themselves.以及第二段的描述可知它们改变颜色主要是为了保护自己,所以该选D。
【小题2】细节理解题。根据第三段最后一句This is because they have the colours much like the tree.
可知他们有树木一样的颜色,所以该选A。
【小题3】细节理解题。根据第四段中A kind of fish in the sea can send out a kind of very black liquid when it faces danger. While the liquid spreads over, the enemies cannot find it.的描述可知在海里的鱼面临危险时能发出一种黑色的液体,当液体扩散开来,敌人无法找到它。所以该选B。
【小题4】标题归纳题。根据本文主要介绍了不同的动物或昆虫的颜色的作用可知该选C。
考点:科普类阅读。
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