高等继续教育 / 专科英语II
正确率：100%
题型描述: 单选题
The atmosphere _ _ _ _ _ _ certain gases mixed together in definite proportions.
A. consists of
B. makes up
C. consists in
D. composes
The atmosphere _ _ _ _ _ _ certain gases mixed together in definite proportions.
A. consists of
B. makes up
C. consists in
D. composes
参考答案：
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