90. Which of the following is not the main gas responsible for the global greenhouse effect?
(A) Nitrous oxide
(B) Methane
(C) Carbon monoxide
(D) Ozone

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統計: A(5), B(13), C(26), D(9), E(0) #2319694

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#4492423
以下哪項不是造成全球溫室效應的主要氣...
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