Question

Air is an odorless (無(wú)氣味的), invisible (看不見(jiàn)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 (明確的) 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.
【小題1】What does the underlined word “Stuff” (in Paragraph 2) mean?

A．Press tightly.	B．Take out.
C．Put down.	D．Turn fully.

【小題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

【小題3】Which of the following pictures gives us the correct result?
( W—water;  A—air;  H—handkerchief )

Answer 1

【小題1】A
【小題2】C
【小題3】C

解析試題分析：文章介紹了空氣的特點(diǎn)，用實(shí)驗(yàn)證明空氣是占據(jù)空間的。
【小題1】猜詞題：從后面的句子：so that it will not fall out when the glass is turned upside-down.杯子倒過(guò)來(lái)手帕不會(huì)掉，說(shuō)明是緊緊的按壓。選A
【小題2】細(xì)節(jié)題：從第二段的句子：It is easy to prove that air is something that takes up space.可知這個(gè)實(shí)驗(yàn)很容易做。選C
【小題3】細(xì)節(jié)題：從最后一段的句子：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.可知杯子倒過(guò)來(lái)的時(shí)候，手帕在杯子底部，杯子的其余部分是空氣。選C。
考點(diǎn)：考查科普類(lèi)短文
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