检验集气瓶中的CO2是否集满的正确方法是(   ) A.将燃着的木条放

检验集气瓶中的CO2是否集满的正确方法是(  

A.将燃着的木条放在瓶口         B.向瓶内倒入澄清石灰水

C.在瓶口闻其气味               D.将带火星的木条插入瓶里

答案

A

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