持久黄体是一种生理乏情现象。
参考答案：错
The bell________the end of the period rang,________our heated discussion. [ ]
A. indicating; interrupting
B. indicated; interrupting
C. indicating; interrupted
D. indicated; interrupted
双侧跟腱反射消失，脊髓病变在（）
A.腰1～2
B.骶1～2
C.腰1～2
D.骶4～5
E.胸11
