Question

【题目】 Do you know why different animals or pests(昆虫) have their special colors? Their colors 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 colors of crops. When crops are green，locusts look green. But as the harvest time comes，locusts change to the same brown colors 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 will 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. 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 when they face danger. While the liquid spreads over(散开)，their enemies cannot find them. And they immediately swim away. So they have lived up to now though they are not strong at all.

【1】From the passage，we learn that locusts ________．

A.change their colors to protect themselves

B.are dangerous to their enemies

C.are easily found by birds

D.are small animals

【2】How can pests with different colors from plants keep out of danger?

A.They have the colors much like the enemies.

B.They hide themselves by day and appear at night.

C.They run away quickly.

D.They have to move quietly.

【3】Bears and lions can keep safe because ________．

A.they live in forests

B.they have the colors much like the trees

C.they move quietly

D.they like brown and gray colors

【4】Why can the fish mentioned(提到) in the last paragraph live up to now?

A.Because they are very big and strong.

B.Because the liquid they send out can help them escape from their enemies.

C.Because they swim faster than any other fish.

D.Because the liquid they send out can kill their enemies.

【5】Which is the best title for this passage?

A.Colors of Different Animals and Pests

B.The Main Use of Colors for Animals and Pests

C.The Change of Colors for Animals and Pests

D.Some Animals and Pests

Answer 1

【答案】

【1】A

【2】B

【3】B

【4】B

【5】B

【解析】

短文大意：短文主要介绍了动物和昆虫的一种自我保护方法，它们通过改变自身颜色来适应周围环境，不让敌人发现自己。

【1】题意：从文章中，我们了解到蝗虫改变颜色是为了保护自己。考查细节理解。根据开头“Their colors seem to be used mainly to protect themselves它们的颜色似乎主要用来保护自己”，结合下文“If you study the animal life, you will find the main use of colors is to protect themselves如果你研究动物的生活，你会发现颜色的主要用途是保护自己”可知，蝗虫靠改变颜色来保护自己，change their colors to protect themselves符合题意，故选A。

【2】题意：植物身上不同颜色的昆虫是如何避免危险的？考查细节理解。根据“So they have to hide themselves for lives and appear only at night.所以他们不得不躲起来，只在晚上出现”，可知蝗虫白天躲藏晚上出现；They hide themselves by day and appear at night符合题意，故选B。

【3】题意：熊和狮子可以保持安全，因为他们的颜色很像树木。考查细节理解。根据“This is because they have the colors much like the trees. 这是因为它们的颜色很像树木”可知选B。

【4】题意：为什么最后一段提到的鱼可以活到现在？考查细节理解。根据“A kind of fish in the sea can send out a kind of very black liquid when they face danger . While the liquid spreads over，their enemies cannot find them海里的一种鱼在遇到危险的时候会发出一种黑色的液体。当液体扩散的时候，他们的敌人找不到他们”，可知它们喷出的液体能够帮助它们脱离危险，Because the liquid they send out can help them escape from their enemies符合题意，故选B。

【5】题意：这篇文章最好的标题是什么？考查标题归纳。根据中心句“Their colors seem to be used mainly to protect themselves它们的颜色似乎主要用来保护自己”，可知短文介绍的是，动物通过改变自身颜色来适应周围环境，从而不让敌人发现自己。备选项“The Main Use of Colors for Animals and Pests动物和昆虫颜色的主要用途”符合文意，故选B。

本文内容比较简单，理解不难。题目以细节理解为主，各小题与上下文联系比较紧密，答题中一定要注意联系上下文。答完后多读几遍，看看是否符合逻辑，适当修改。例如小题1，问我们从文章中了解到什么，考查细节理解；根据开头“Their colors seem to be used mainly to protect themselves它们的颜色似乎主要用来保护自己”，结合下文“If you study the animal life, you will find the main use of colors is to protect themselves如果你研究动物的生活，你会发现颜色的主要用途是保护自己”可知，蝗虫靠改变颜色来保护自己，change their colors to protect themselves符合题意，故选A。