题目内容
雌孕激素对下丘脑及腺垂体的反馈机制，正确的是
2022-03-31
A.雌激素-负反馈，孕激素-正反馈
B.雌激素-正反馈，孕激素-负反馈
C.雌激素-负反馈，孕激素-负反馈
D.雌激素-正、负反馈，孕激素-负反馈
E.雌激素-正、负反馈，孕激素-正反馈
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