8、确定减压干燥法的时间的方法是（）。 A.干燥到恒重 B.规定一定时间 C.50℃～60℃干燥3～4小时 D.50℃～60℃干燥 - 查题网

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河南成教 / 河南理工大学

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8、
确定减压干燥法的时间的方法是（）。

A.干燥到恒重

B.规定一定时间

C.50℃～60℃干燥3～4小时

D.50℃～60℃干燥约1小时

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河南理工大学

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