题干
—Can you cook, Jenny?
—No, I can't. Well, I can cook eggs. But .
A：that's all
B：that's all right
C：that's true
D：this is all
答案(点此获取答案解析）
A
是1 mol烯烃R和1 mol 氢气发生加成反应后的产物，则R可能的结构简式有( )