---What are you going to do this weekend?

-----I’m going to help _____the city parks with my classmates to make them clean.

A．set up

B．fix up

C．put up

D．clean up

下列各项检查中能反映有孕激素分泌的()

A．基础体温升高0.3～0.5℃

B．尿雌三醇测定

C． * * 粘膜为表层细胞脱落

D．子宫内膜增生状态

E．宫颈黏液拉丝度减少