题目

下列化学反应属于分解反应的是（） A . 镁＋氧气 氧化镁 B . 氯酸钾 氯化钾＋氧气 C . 氢气＋氯气 氯化氢 D . 二氧化碳＋氢氧化钙 碳酸钙＋水 答案：B －Peter likes playing football, but he can't play it well． －________． [　　] A． So does his brother B． Nor does his brother C． So is his brother D． It's the same with his brother