问题:
[单选题]
比较羧酸 HCOOH(I),CH3COOH(II),(CH3)2CHCOOH(III),(CH3)3CCOOH(IV) 的酸性强弱( )
AIV>III>II>I
BI>II>III>IV
CII>III>IV>I
DI>IV>III>II
比较羧酸 HCOOH(I),CH3COOH(II),(CH3)2CHCOOH(III),(CH3)3CCOOH(IV) 的酸性强弱( )
AIV>III>II>I
BI>II>III>IV
CII>III>IV>I
DI>IV>III>II
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