The atmosphere ________ certain gases mixed together in defi

时间:2022-08-15 20:36来源:未知作者:admin 点击: 次

12. The atmosphere ________ certain gases mixed together in definite proportions. A. composes of B. is made up C. consists of D. makes up of

12. The atmosphere ________ certain gases mixed together in definite proportions.

A. composes of

B. is made up

C. consists of

D. makes up of

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