题目

分子式为C10H14的二取代芳烃（即苯环上有两个侧链），其可能的结构有（    ）    A．6               B．9              C．15               D．22 答案：B() 5. —Why didn't you answer my telephone yesterday?一Sorry,I a bath.   A. took   B. take   C. am taking   D. was taking