本题目来源于试卷: Atmospheric Structure & Function，类别为 IB环境系统与社会
[单选题]
Nutrients are constantly cycled in ecosystems, inclu kw87 b f4fa;zdh-7 3 4lnzorhmmgc8i.dingu:xqv) / v6bsv3vcu0e in the atmosphere as a gaseousc6u v :)v/u3 0sbvxqev form.
State which element is not found in the atmosphere.
A. Carbon
B. Sulfur
C. Nitrogen
D. Phosphorus
参考答案: D
本题详细解析:
Unlike the other elements, phosphorus is not foun; kd9xo06n)(ertz9l v -rxc qsd as a gas.
Carbon exists as a gas in the atmosphere in the form of carbon dioxide, carbon monoxide, and methane (Option A).
Sulfur can xr6etodz 90x;9(-vs)k rn lcqbe found as sulfur dioxide which mainly comes from burning coal (Option B). Nitrogen gas is found in the atmosphere and oxides of nitrogen are emitted during the combustion of fossil fuels. (Option C)
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