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【判断题】
青霉素钠在酸性介质中稳定A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】上皮细胞游离面上有刷状缘的是( )A. 近端小管 B. 远端小管 C. 细段 B. 直集合管 E. 弓状集合管
【简答题】Look at those big black clouds. It ____(rain).
【单选题】___ we seem to have conquered nature. But this is not true. Many scholars actually say that we should stop __ nature before it is too late.
A.
On the surface, tampering to
B.
On the surface, tampering with
C.
On the appearance, tampering with
D.
In the surface, interfering with
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