2. 外语
  3. A(The atmosphere) B(is consisted) of certain gases C(mixed together) D(in) definite proportions.

A(The atmosphere) B(is consisted) of certain gases C(mixed together) D(in) definite proportions.

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问题 A(The atmosphere) B(is consisted) of certain gases C(mixed together) D(in) definite proportions.
选项
答案B
解析 consist of sth．由什么构成，consist是不及物动词，不用被动。
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