题目

I do not usually celebrate my birthdays until I met him. _______, I do not like any big party because I’m not good at small talk. A. On the whole       B. On average          C. In addition          D. In other words 答案：D 下图表示4－溴环己烯所发生的4个不同反应．其产物一定只含有一种官能团的反应 [　　] A． ①② B． ②③ C． ③④ D． ①④