题文

阅读理解

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 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 trees.        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.

1. From the passage we 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

2. How can pests with different colours from plants keep out of danger?

A. They run away quickly. B. They change to the same colours as their enemies'. C. They hide themselves in the day and appear at night. D. They have to move quietly.

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

4. The kind of fish live up to now because ________.

A. it is very big and strong B. the liquid it sends out helps it escape from its enemies C. the liquid it sends out can kill its enemies D. it swims faster than any other fish

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

题型：阅读理解  难度：中档

答案

1-5 D C A B C

据专家权威分析，试题“阅读理解 Do you know why different animals or pests have the..”主要考查你对  科教类阅读  等考点的理解。关于这些考点的“档案”如下：

科教类阅读

考点名称：科教类阅读

• 科普类的阅读：
  科普类的阅读理解包含介绍科学知识、社会知识的短文。阅读这类短文时，要以事实为中心进行思考，抓住事物的特征、用途、相互关系等。
  如果是介绍社会现象的文章，要掌握所谈现象的内涵。

• 答题技巧：
  1. 加强整体意识，把握文章的主要内容。在阅读的时候可给段落标上序号，并给重要的句子和
     关键词做上记号，尤其是各段中心句，为答题提供更快捷更多的信息源。
  2. 审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。
  3. 定位阅读，强化对应意识。同时要注意原文利用和自我加工相结合。