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.composes
C.makes up
D.consists in
The atmosphere ＿＿＿＿＿＿＿＿＿ certain gases mixed together in definite proportions.
A.consists of
B.composes
C.makes up
D.consists in
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