题目

制取一氯乙烷，采用的最佳方法是( )。 A．乙烷和氯气取代反应                   B．乙烯和氯气加成反应 C．乙烷和HCl作用               D．乙烯和HCl加成反应          答案：D—Have you ever read Harry Potter?—Of course.It's a famous novel ________ by J．K.Rowling.A. written B. to write C. writing D. wrote