【題目】防毒面具濾毒罐內(nèi)盛放的物質(zhì)是( )。

A.石墨 B.活性炭

C.焦炭 D.生石灰

【答案】B

【解析】

試題分析:防毒面具濾毒罐內(nèi)盛放的物質(zhì)是必須是吸附性很強的活性炭。

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