题目

The little boyhas made rapid progress recently and (praise) several times by his teachers. 答案：【1】has been praised某金属能和盐酸反应生成氢气，该金属与锌组成原电池时，锌为负极，则该金属可能为（  ）                                                             A、铝          B、铜        C 、锡          D 硅