环己烷产生的原因是什么? A .环的张力 B .碳原子具有 sp3 杂化轨道 C .σ键的旋转 D .碳原子所形成的键角要求为 109 ° 28 ′
A.
B.
C.
D.
D
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】Educator today are more and more often 【C1】______ to say that computer literacy is absolutely necessary for college students. Many even【C2】______ that each incoming freshman should have permanent【C3】_...
【简答题】When I spent Christmas away from home in Europe for the first time, I was only 14 and it was absolutely horrific. I am now married and live in the US. So there is little possibility for me to go home ...
【单选题】...to be the subject of rapturous profiles in Rolling Stone and People magazines; and to be photographed by Annie Leibovitz for an Absolut Vodka ad.
【简答题】A man living absolutely alone in a desert or forest is free from other people; but he is not absolutely free. His is limited in several ways. Firstly, by the things around him, such as wild an...