阅读理解Doyouknowwhydifferentanimalso

阅读理解 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 all1.From the passage we learn that locusts________A.are small animalsB.are easily found by birdsC.are dangerous to their enemiesD.change their colors to protect themselves2.How can pests with different colors from plants keep out of danger?A.They run away quicklyB.They have the colors much like their enemiesC.They hide themselves by day and appear at nightD.They have to move quietly3.Bears and lions can keep safe because _________A.they have the colors much like the treesB.they move quietlyC.they like brown and gray colorsD.they live in forests4.Why can the kind of fish live up to now?A.Because it is very and strongB.Because the liquid it sends out can help it escape from its enemiesC.Because the liquid it sends out can kill its enemiesD.Because it swims faster than any other fish5.Which is the best title for this passage?A.The Change of Colors for Animals and PestsB.Colors of Different Animals and PestsC.The Main Use of Colors for Animals and PestsD.Some Animals and Pests

DCABC解析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。 2.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。 3.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。 4.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。5.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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