A.CH2=CHCOOH B.C6H5CH3 C.C6H5COOH D.CH3COOH
A.伯胺 B.仲胺 C.叔胺 D.所有胺
A.②>④>③>①B.①>②>③>④C.③>②>④>①D.④>①>③>②