15. The Earth's atmosphere is ______ various gases, including nitrogen, oxygen, and carbon dioxide.
(A) resolved to
(B) opposed to
(C) consisted of
(D) composed of
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統計: A(29), B(35), C(91), D(113), E(0) #3357923
統計: A(29), B(35), C(91), D(113), E(0) #3357923