干土效应 effect of soil drying
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1、土壤指示植物 indicator plant of soil
土壤指示植物 indicator plant of soil
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2、An advantage of an ABC dry chemical ov
An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.Alack of toxicityBthe multipurpose extinguishing abilityCbum-back protectionDcooling ability
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3、An advantage of a dry chemical over a
An advantage of a dry chemical over a carbon dioxide fire extinguisher is its（）.Agreater rangeBeffectiveness on all types of firesCcleanlinessDAll of the above
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4、毒效应谱（spectrum of toxic effects）
毒效应谱（spectrum of toxic effects）
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5、An advantage of an ABC dry chemical ov
An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.Alack of toxicityBthe multipurpose extinguishing abilityCburn-back protectionDcooling ability
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6、土壤局部灭菌 partial sterilization of soil
土壤局部灭菌 partial sterilization of soil