题目

以CuSO4溶液为电解质溶液进行粗铜（含Al、Zn、Ag、Pt、Au等杂质）的电解精炼，下列说法正确的是（ ） A . 电能全部转化为化学能 B . 粗铜接电源负极，发生氧化反应 C . 溶液中Cu2+向阳极移动 D . 利用阳极泥可回收Ag、Pt、Au等金属 答案：D根据句意，用所给单词的适当形式填空。【1】These stickers are expensive. Do you have ______________ (cheap) ones?【2】Before we have the meal, let’s have some _______________ (tomato) soup first.【3】Look out! The car is ______________ (complete) out of control.【4】The great swimmer Sun Yang is the ______________ (proud) of not only China, but also Asia.【5】The clothes they wear are like these_______ (hero).