Because __ is highly compressible,it is impossible to define a clear upper boundary of the atmo
Because __ is highly compressible,it is impossible to define a clear upper boundary of the atmo
A.air
B.the air
選哪個(gè),為什么
A.air
B.the air
選哪個(gè),為什么
英語人氣：904 ℃時(shí)間：2020-09-20 11:13:20
優(yōu)質(zhì)解答
選A,這里air不是特指自然界里的整個(gè)天空,空氣.這里就是單純講述氣體,空氣,它是可以高度壓縮的,沒有特指的含義.所以不用特定冠詞“the”the air的謂語也用單數(shù)形式嗎是啊，不可數(shù)啊
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