答案:C. CH3-CH2-CH(CH3)-C(CH3)3 CH3-CH2-C(CH3)2-CH(CH3)2 CH3-C(CH3)2-CH2-CH(CH3)2
C 2,3,3-三甲基戊烷 CH3CH(CH3)C(CH3)2CH2CH3
C啊 ，必须是C
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