题目

加成反应也是有机化学中的一类重要的反应类型，下列各组物质中不能全部发生加成反应的是(  )    A．乙烷、乙烯                                    B．乙烯、乙炔       C．氯乙烯、溴乙烯                         D．顺－2－丁烯、反－2－丁烯 答案：Athough，twelve，Canada，miss，true1.Jack speaks English well.He is a _____boy.2.My brother is an honest boy.He always tells the_____．3.Today is my _____birthday.I will have a party at home.4._____ it rained heavily，he went to work as usual.5.Can I borrow your pen? Mine is_____．