从海水可获得的在常温下为液体的单质是（） A．Mg

从海水可获得的在常温下为液体的单质是（）

A．Mg B．K C．Br₂D．I₂

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从海水可获得的在常温下为液体的单质是（ ） A．Mg

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从海水可获得的在常温下为液体的单质是（） A．Mg