题目

如图装置电解水，一段时间后的现象如图所示．对该实验的描述错误的是（ ）                                                        A．甲试管中收集到的是一种可燃性气体                             B．该实验能证明水是由氢元素和氧元素组成                         C．向水中加入少量硫酸，能增强水的导电性                         D．甲、乙两试管内收集到的气体的质量比约---What made him so angry?    --- _______.A．Because his son escaped from schoolB．His son’s escaping from school C．His son escaped from schoolD．What his son escaped from school