单项选择题
A.370℃ B.80℃ C.50℃ D.70℃
A.15ml/m3福尔马林加7.5克高锰酸钾 B.0.5%0.05%-0.2%的新洁而灭60 C.3%-5%的来苏儿 D.0.1-1%漂白粉
A.30min B.15min C.2h D.5h
A.3 B.30 C.15 D.10
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