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 constanl) ww-w(w 5f85m dzusvtly tgfk6i03o5 8d2 m hfpnerqw/6wsz 9 m+cycled in ecosystems, including in the atmosphere as a gaseous for69mk0p5zf nwofm r6sthw/ e8d3 gi2+qm.
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 found am2 tk.ptd; .l 8)nll fswmt.h,s a gas.
Carbon exists as a gas in the atmospherespmd fm)llh...tn8t l 2tw;k, in the form of carbon dioxide, carbon monoxide, and methane (Option A).
Sulfur can be 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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