题目

12．—Hello, Jack, where were you last night?  —_____. We were talking about the war on Iraq.        A．At the Roberts’       B．To the Roberts  C．To Roberts       D．At the Roberts 答案：A下列各组有机物中，只需加入溴水就能一一鉴别的是（ ）A.己烯、苯、四氯化碳B.苯、己炔、己烯C.己烷、苯、环己烷D.甲苯、己烷、己烯