阿尔兹海默病起病缓慢，病程呈（），具有（）。

Kathy （）a lot of Chinese when she was working in Beijing during the summer vacation.

A.took up
B.picked up
C.brought up
D.turned up

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什么是粉碎性骨折脱位; 粉碎性骨折脱位名词解释定义是什么?

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