甲醚和乙醇属于下列哪种同分异构现象
A. 碳链异构
B. 位置异构
C. 官能团异构
D. 构象异构
Hehasmanyfriendsatschool,_____?
A. hashe
B. doeshe
C. doesn'the
D. isn'the
Mr.Green is a friend of_____.
A. Peter's father's
B. Peter's father
C. father's of Peter
D. Peter father's
_____called him this afternoon.
A. My brother's friend
B. A friend of my brother
C. A friend of my brother's
D. My brother friend