問題詳情

13.How many CH3 groups are there in the compound 4-ethyl-2,4-dimethylhexane？
(A)2　
(B)3　
(C)4　
(D)5

參考答案

答案：D
難度：適中0.461538
統計：A(1),B(4),C(1),D(6),E(0)