单项选择题
A.2s22p4 B.1s22s22p4 C.2s12p5 D.1s22s12p5
A.1s22p22p2 B.2s22p2 C.2p2 D.2p4
A.乙酸 B.乙醇 C.乙醚 D.丁酮
A.CH3COOH B.H2SO4 C.HNO3 D.
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