如图是实验室制取气体的两种常见装置请回答下列问题.1若用甲装置制取氧气时在试管口塞一团棉花的目的是防止加热时粉末进入导管防止加热时粉末 Template




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tomski如图是实验室制取气体的两种常见装置请回答下列问题.1若用甲装置制取氧气时在试管口塞一团棉花的目的是防止加热时粉末进入导管防止加热时粉末 coloring