Question

Air is an odorless (无气味的), invisible (看不见的) gas that surrounds the earth. It is everywhere on the planet. An “empty” drinking glass and an “empty” room, to give two examples, 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 (明确的) shape, but, because it is matter, it takes up space. It is easy to prove that air is something that takes up space. Stuff a dry handkerchief into the bottom（底部） of a glass so that it will not fall out when the glass is turned upside-down. Push the upside-down glass; hold it straight into a jar of water till the glass is completely covered. When the glass is taken out of water, the handkerchief will be dry. The air inside the glass takes up space and keeps the water from coming in.

1.What does the underlined word “Stuff” (in Paragraph 2) mean?

A．Press tightly.                           B．Take out.

C．Put down.                             D．Turn fully.

2.The writer tells us that _______.

A．the experiment is done in the laboratory

B．the experiment is done outside the room

C．the experiment is easily done

D．the experiment is carried out indoors

3.Which of the following pictures gives us the correct result?

( W—water;  A—air;  H—handkerchief )

 

Answer 1

【答案】

1.A

2.C

3.C

【解析】

试题分析：文章介绍了空气的特点，用实验证明空气是占据空间的。

1.猜词题：从后面的句子：so that it will not fall out when the glass is turned upside-down.杯子倒过来手帕不会掉，说明是紧紧的按压。选A

2.细节题：从第二段的句子：It is easy to prove that air is something that takes up space.可知这个实验很容易做。选C

3.细节题：从最后一段的句子：Push the upside-down glass; hold it straight into a jar of water till the glass is completely covered. When the glass is taken out of water, the handkerchief will be dry. The air inside the glass takes up space and keeps the water from coming in.可知杯子倒过来的时候，手帕在杯子底部，杯子的其余部分是空气。选C。

考点：考查科普类短文

点评：本文要求考生理解文章的主旨，通过不同人的不同观点，找出文章的特定的写作态度，读者应当知道如何去做或按照某种方式传递思考问题。推理判断题的答案不可能在文章中直接找到，因此推理时我们务必要忠于原文，在文章中寻找并确定可推论的依据。