规范的操作是实验成功的保证,下列实验操作正确的是（）） �

规范的操作是实验成功的保证,下列实验操作正确的是（　　）

　　）

A．点燃酒精灯 B．读出液体的体积 C．滴加液体 D．过滤

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规范的操作是实验成功的保证,下列实验操作正确的是（ ）） �

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规范的操作是实验成功的保证,下列实验操作正确的是（）） �