下列做法是为了加快液体蒸发的是( ) A．酒精灯不用时要

下列做法是为了加快液体蒸发的是( )

A．酒精灯不用时要盖上灯帽 B．洗头后用电吹风把头发吹干

C．农业灌溉中用管道输水代替沟渠输水 D．蔬菜用保鲜膜包好后放人冰箱冷藏室

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下列做法是为了加快液体蒸发的是( ) A．酒精灯不用时要

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