摘要:下列各组有机物中.既不互为同系物.又不互为同分异构体的是( ) ①CH3CH2CH2SCH2CH3与CH3CH2SCH3 ② ③ ④ ⑤NH3与N2H4与N3H5与N4H6 A.①③ B.③④ C.②⑤ D.②④
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