本题目来源于试卷: Transfers of Energy &Matter，类别为 IB生物学
[单选题]
Nutrients are constantly cycled in ecosystems, sgda:exqdp1 o-4t-v)d2i gerqw6:m 8including in the atmospsr ja5*z2h.-zmxz nv ,here as a gaseous form. Which of the following elements is not found in the z,5z .2nvhzxm* jas-ratmosphere?
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 as atnwm0hzpk1 ;5 wqfqx 8q5c/q9 gas,
Carbon exists as a gas in the atmosphere in the form of carbon dioxide89 z /q0;twqcpwhk5xq fqm1n 5, carbon monoxide, and methane (Choice A).
Sulfur can be found as sulfur dioxide which mainly comes from burning coal (Choice B). Nitrogen gas is inert and found in the atmosphere and oxides of nitrogen are emitted during the combustion of fossil fuels. (Choice C)
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