【題目】根據短文內容的理解,選擇正確答案。
Air is a colorless, tasteless and invisible(看不見的)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 shape, but because it is matter, it takes up space and it has weight. It is easy to prove that air is something that takes up space. Stuff a piece of dry cloth(布)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 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)Since air is matter, it has ____________.
A.room, and weight as well
B.both room and shape
C.either room or weight
D.neither shape nor weight
(2)The word "Stuff" means __________ in Chinese.
A.撕
B. 蓋
C. 取掉
D. 塞
(3)The writer tells that the experiment(實驗)___________.
A.is carried out in the space
B.must be done in the lab
C.is made in the room
D.can only be done in the open air
【答案】
(1)A
(2)D
(3)C
【解析】這篇短文介紹了空氣也要占據空間,并有一定的重量,并用一個實驗說明了這個說法。
(1)根據Air, as a gas, has no definite shape, but because it is matter, it takes up space and it has weight.及上文描述可知空氣也要占據空間,也有重量,故選A。
(2)聯系下文so that it will not fall out when the glass is turned upside down.以便這個玻璃杯倒過來時,它不至于落下來?芍侨〉囊馑肌9蔬xD。
(3)短文并沒有直接指出這個實驗是在哪里進行的,但是分析四個選項可知不是必須在太空,實驗室進行,也不只是在戶外才可以進行,故選C,在室內進行。為最佳答案。
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