雌激素对垂体发生正反馈作用的最低阈值为A.100pg/ml B.100ng/m

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问题 雌激素对垂体发生正反馈作用的最低阈值为A.100pg/mlB.100ng/mlC.200pg/mlD.300pg/mlE.300ng/ml

选项 A.100pg/ml
B.100ng/ml
C.200pg/ml
D.300pg/ml
E.300ng/ml

答案 C

解析
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