I remember forthe job,but I forget the exact amount.

I remember forthe job,but I forget the exact amount.

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65岁以上单纯主动脉瓣狭窄的常见病因是 (  ) 。

65岁以上单纯主动脉瓣狭窄的常见病因是 (  ) 。

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Why did the famous teacher use a ¥100 bill at his lesson? ( 

Why did the famous teacher use a ¥100 bill at his lesson? (  )

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