题文

阅读理解。

Air is a colorless, tasteless and invisible (无形的)  gas that is around us. An"empty" drinking glass and an"empty"room,in fact,are not really empty. Each is filled with air. When the glass is filled with water, the water pushes the air out of the glass.      Air, as a gas, has no definite (确切的) shape, but because it is matter, it takes up space and it has weight. It is easy to prove (证明) that air is something that takes up space. Stuff a piece of dry cloth into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the upside-down glass,holding it straight up and down, into a jar of water till the glass is completely covered. When the glass is taken out of the water, the cloth is still dry. The air inside the glass shows that it takes up space and keeps the water from coming in.

1. Air has no definite shape because          . A. it is a mixture       B. it is a gas       C. it is matter       D. it is nothing 2. Since air is matter, it has            . A. weight         B. color       C. taste         D. shape 3. The word"stuff"in the passage means"         "in Chinese. A. 撕裂           B. 遮盖       C. 取下         D. 填塞 4. The experiment the writer tells in the passage          . A. should be carried out in space B. must be done in the lab C. can be made in the room D. only can be done in the open air 5. Which of the following gives us the correct picture of the experiment? (W=water   A=air   C=cloth)

题型：阅读理解  难度：中档

答案

1-5  BADCB

据专家权威分析，试题“阅读理解。 Air is a colorless, tasteless and invisible (无形..”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。