题目

阅读理解；阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。 This is a happy family. There are three members (成员) in it.   Hi! My name is Da Tou. I have a big head and two small hands. I have two big eyes. I am wearing(穿) a yellow T-shirt. I have no brothers or sisters. My parents love me very much.   This is my mother. She is a little fat. She often wears an apron(围裙). She is good at cooking. She works in a shop near our house. My mother is a kind woman.   This is my father. He is also my good friend. He has a small head and two big ha有关电解水实验（如下图）的下列叙述，错误的是（   ） A．试管甲中的气体是氢气 B．试管乙中的气体是氧气 C．该实验证明水由氢气和氧气组成 D．该实验证明水由氢元素和氧元素组成