I was angry about the act of dishonesty in the exams. I’m not saying that I’m a good student or I’ve never cheated. I once wrote the answer in my hand for a history test but , unlucky, was caught by my teacher. Because she was one of my most favorites, there were no words to describe how sorry I felt at once. I thought cheat would help me keep my straight A’s. Little did I know that I was hurting not only herself but also my teacher. From this lesson I know teacher want students to succeed by learning on their own and do the best they can, not by cheating.

下述哪项对判断排卵是无用的（）。

A.基础体温

B.宫颈黏液检查

C.测尿中孕二醇

D.测尿中雌三醇

E. * * 脱落细胞检查