题干

雷雨天空气中的某些物质之间发生了一系列化学反应,最终产生了氮肥.其中跟下列反应无关的是(反应中的条件未注明,也未配平)(    )

A:N2+H2→NH3

B:N2+O2→NO

C:NO+O2→NO2

D:NO2+H2O→HNO3+NO

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A

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