不定项选择

采用色谱归一化法定量的前提条件是试样中所有组分全部出峰。

A．正确
B．错误

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妊高症最基本的病理生理改变是（）。

A．全身小血管痉挛
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C．蜕膜萎缩
D．滋养细胞增生

单项选择题

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