A：由乙烯跟水反应制取乙醇
B：由乙酸制乙酸乙酯
C：乙烯使酸性高锰酸钾溶液褪色
D：甲烷与氯气在光照条件下发生反应
已知集合A={x||x﹣2|＞1}，B={x|x2+px+q＞0}，若A=B，则p+q=（ ）
He _______ an English club last year and has improved his English a lot.
你想让弟弟穿上鞋子出门，可以说：
We had to wait half an hour we had already booked(预定) a table.
