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【单选题】
设f(x)在(a，b)内有连续的导数，x 0 ∈(a，b)，若f(x)满足( )，则f(x)在x 0 取到极小值。A.
f'(x 0 )＞0，f''(x 0 )=0
B.
f'(x 0 )＜0，f''(x 0 )=0
C.
F'(x 0 )=0，f''(x 0 )＞0
D.
f'(x 0 )=0，f''(x 0 )＜0
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反馈参考答案：
举一反三
【单选题】女50岁,绝经过渡期功血,治疗原则是
A.
查原因、止血、促排卵
B.
止血、调整周期、促排卵
C.
止血、调整周期、促排卵
D.
止血、调整周期、防内膜病变
E.
止血、减少经量、促排卵
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