多项选择题

液体培养基的用途有（）。
A、培养种子
B、菌种保藏
C、发酵
D、分离菌种

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根据通风机的作用原理主要分为_和___。

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单项选择题

The English Renaissance is marked by ( ).

A．rebirth of classical ideas that were lost in the Ancient Greece
B．the impression of a romantic, revolutionary, and sentimental age
C．the impression of a learned, civilized, progressive and enlightened age
D．imitation of the writing rules in ancient Greek literary works