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【单选题】
对于函数 ,下列结论正确的是( )
A.
是极大值点
B.
是极小值点
C.
点 是曲线的拐点
D.
点 是曲线的拐点
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【单选题】According to the author, which one of the following does NOT belong to the category of antioxidants besides vitamin E?
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