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Do you know why different animals or pes...

Do you know why different animals or pests have their special colors? Colors in them seem to be mainly used to protect themselves.

Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors with the change of the colors of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change into the same brown color as crops have. Some other pests whose colors are different form 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 animals’ life, you’ll find the main use of colors is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters because their colors are much like the trees.

Colors are useful not only on the land, but also in the sea. A kind of fish in the sea can give out a kind of black liquid (液体) when the fish face danger. The liquid spreads over quickly, so they cannot be found by their enemies and can quickly swim away. That is why they live safely though they are not strong at all.

1.From the passage, we can know that ________.

A. locusts are big animals

B. Locusts are easily found by birds

C. Locusts are dangerous to their enemies

D. Locusts can change their colors to protect themselves

2.Those pests with different colors from plants have to ________ to keep out of danger.

A. change their colors

B. hide in the day time and appear at night

C. move quietly

D. hide at night and appear in the day time

3.Bears and lions can keep safe because _______.

A. their colors are much like the trees

B. they move quickly

C. they are very strong

D. they live in forests

4.According to the passage, the fish can keep safe because ________.

A. they can change their colors

B. they can give out a kind of liquid

C. they are strong enough

D. they swim faster than any other fish

5.Which is the best title for this passage?

A. The colors of the seasons

B. Animals on the land and in the sea

C. The main use of colors for animals and pests

D. How to keep safe in the sea

 

1.D 2.B 3.A 4.B 5.C 【解析】 试题分析:短文大意:该短文讲述了不同的动物和害虫都会有着和环境相似的颜色,这些颜色主要是用来保护它们自己不受到伤害的。 1.D细节理解题。根据第二段中Some birds like eating locusts. but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops.蝗虫能够随着农作物的颜色的变化而改变自己的颜色,这样就可以保护自己不被鸟类吃掉。所以选D。 2.B细节理解题。根据第二段中Some other pests whose colors are different form plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.可知一些其他的害虫,它们的颜色是不一样的,很容易被发现,被吃掉。因此,他们必须隐藏自己,只能在夜间出现,所以选B。 3.A细节理解题。根据第三段末They cannot be easily seen by hunters because their colors are much like the trees可知那是因为熊和狮子有着和树木很相像的颜色。所以选A。 4.B细节理解题。根据最后一段中A kind of fish in the sea can give out a kind of black liquid (液体) when the fish face danger.可知一种海里的鱼当面对危险会发出一种黑色的液体。所以选B。 5.细节理解题。这篇文章讲述了不同的动物和害虫都有着自己特殊的颜色,这些颜色主要就是用来保护自己远离危险。所以选C。 考点:考查科普类短文阅读。
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