化学基本知识测试HC≡CHCH3C≡C─DVIP

9164完成下列转变：HC≡CHCH3C≡C─D0091比较CH3─CH2CH3(I),CH3─CH=CH2(II),CH3─C≡CH(III)三种化合物的C─C单键键长次序为:(A)I>II>III...