)
The atmosphere ______ certain gases mixed together in definite proportions.
A)
composes of
B)
is made up
C)
consists of
D)
makes up of
出自：中国石油大学- 《大学英语3》
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)
The atmosphere ______ certain gases mixed together in definite proportions.
A)
composes of
B)
is made up
C)
consists of
D)
makes up of
出自：中国石油大学- 《大学英语3》