题目内容

with great difficulty that he persuaded his superior into accepting his plan.

A. It was
B. There was
C. As
D. What

查看答案

搜索结果不匹配？点我反馈

更多问题

He has been to Italy, but that he understands the Italians.

A. it follows
B. it doesn't follow
C. it is followed
D. it isn't followed

下列试剂,在光照下与不对称烯烃反应,能得到反马氏产物的试剂是()。

A. HF
B. HI
C. HBr
D. HCl

烷烃分子中混有少量的烯烃,可用下列哪种方法除去?()

A. 卤代
B. 减压蒸馏
C. 冷浓硫酸
D. 溴的四氯化碳溶液

顺-3-己烯溴的加成的产物是()。

A. 有旋光性的
B. 外消旋体
C. 内消旋体
D. 外消旋体与内消旋体混合物