题文

阅读理解。

Do you know why different animals or pests (害虫) have their special colors？Colors on them seem to be used mainly (主要地) to protect themselves.      Some birds like eating locusts (蝗虫), but birds cannot catch them easily.  Why? Because locusts change their colors according to 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 (隐藏) themselves and appear (出现) only at night.      If you study 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 colors much like the trees.      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 out, its enemies (敌人) cannot find it, so it can escape (逃跑) at once.  That is why it can live long, though it is not 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 colors to protect themselves 2. How can pests with different colors from plants keep out of danger? A. They run away quickly. B. They have the colors much like their enemies. C. They hide themselves by day and appear at night. D. They have to move quietly. 3. Bears and lions can keep safe because _______. A. they have the colors much like the trees B. they move quietly C. they like brown and grey colors D. they live in forests 4. Why can the kind of fish live long? A. Because it is very big and strong. B. Because it can send out a kind of very black liquid to help it escape from its enemies. C. Because it can send out a kind of liquid to kill its enemies. D. Because it swims faster than any other fish. 5. Which is the best title(标题) of this passage? A. The Change of Colors for Animals and Pests. B. Colors of Different Pests. C. The Main Use of Colors for Animals and Pests. D. Some Animals and Pests.

题型：阅读理解  难度：中档

答案

1-5 DCABC

据专家权威分析，试题“阅读理解。 Do you know why different animals or pests (害虫)..”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。