50. 下列聚合物的成分分子為何?

(A) CH3 – CH = CH – CH3
(B) CH3CH2CH3
(C) H2C = CH – CH2 – CH2
(D) CH3CH = C(CH3)2

答案:登入後查看
統計: A(18), B(5), C(4), D(6), E(0) #2935563