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【单选题】

（2011年真题）若f"(x)在x处可导，且f(x 0 )=a，f"(x 0 )=b，而|f(x)|在x 0 处不可导，则[ ]。

A.
a=0，b=0
B.
a=0，b≠0
C.
a≠0，b=0
D.
a≠0，b≠0
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题目标签：真题不可导
参考答案：
参考解析：
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A.
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D.
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A.
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