“气冰”中存在两种温室气体——甲烷和二氧化碳。甲烷是绝大多数“气冰”中的主要成分,同时也是一种反应快速、影响明显的温室气

“气冰”中存在两种温室气体——甲烷和二氧化碳。甲烷是绝大多数“气冰”中的主要成分,同时也是一种反应快速、影响明显的温室气体。有学者认为,在导致全球气候变暖方面,

查看答案

The couple has donated a not __________ amount of money to t

The couple has donated a not __________ amount of money to the foundation.A.inco

查看答案

My daughter has walked eight miles today. We never guessed t

My daughter has walked eight miles today. We never guessed that she could walk _

查看答案

回答第46空。

回答第46空。A.have originated B.be originating C.be originated D.originate

查看答案

从所给的四个选项中选择最合适的一个填入问号处.使之呈现一定的规律性.

从所给的四个选项中选择最合适的一个填入问号处.使之呈现一定的规律性.

查看答案