题目内容

索氏提取装置搭建和拆除时均应先下后上,冷凝水也是下进上出。滤纸筒的高度应以挨着冷凝管下端管口为宜。欲把虹吸时间从10min/次调为8min/次应该适当降低水浴温度。 ( )

A. 对
B. 错

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