题文
阅读理解。 Do you know why different animals or insects have their special colors? Colors are used mainly to protect
themselves.
Why can't some birds easily catch locusts (蝗虫)? It is because locusts change their colors together with
the change of the colors of crops. When crops are green, locusts look green. But as autumn comes, locusts
change to the same brown color as crops have. Some other insects with different colors from plants are easily
found and eaten by others. So they have to hide themselves for lives in the day 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 can't be easily seen by hunters. This is because they have the colors much like the trees.
Have you ever noticed an even more strange thing? A kind of fish in the sea can send out black liquid when
it faces danger. While the liquid spreads over, its enemies can't find it. And it quickly swims away. So it has
lived up to now though it is not strong at all. 1. From the article we learn that locusts __________. A. are dangerous to their enemies
B. are easily found by birds
C. change their colors to protect themselves
D. are small animals 2. How can insects with different colors from plants keep out of danger?A. They have to move quietly.
B. They hide themselves in the day and appear at night.
C. They have the colors much like their enemies.
D. They run away quickly. 3. Bears and lions can keep safe because __________. A. they live in forests
B. they like brown and grey colors
C. they move quietly
D. they have the colors similar to the trees 4. What does the word "liquid" mean in the last paragraph? A. 气体
B. 固体
C. 液体
D. 水蒸气5. Which is the best title for this passage? A. The Main Use of Colors for Animals and Insects
B. Colors of Different Animals and Insects
C. The Change of Colors for Animals and Insects
D. The Change of Different Animals and Plants
题型：未知 难度：其他题型
答案
1-5 CBDAC
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解析
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考点
据考高分专家说，试题“阅读理解。 Do you kn.....”主要考查你对 [科教类阅读 ]考点的理解。
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。
