题目

已知溴乙烷跟氢氧化钠醇溶液共热可得乙烯。现通过以下步骤由制取:(1)从左到右依次填写每步所需的反应类型_____________。(填字母)a.取代反应    b.加成反应    c.消去反应(2)A→B反应所需的试剂和条件是__________________。 答案：解析：据题意知A为，B为，C为，据此可回答各问题。答案：(1)b、c、b、c、b(2)NaOH醇溶液、加热 We have two rooms ______, but I can’t decide ______.A. to live, to choose which oneB. lived, choose which oneC. to live in, which one to chooseD. to live, which one to choose