运动性闭经
参考答案：
剧烈运动后使下丘脑GnRH的释放受到抑制而导致闭经，为下丘脑性闭经的一种。
下述哪项是正式临产的主要表现（）。
A.见红
B.下腹隐痛
C.宫颈变软
D.先露固定
E.规律宫缩及宫颈口逐渐扩大
It is everybody's desire that every effort ____ to reduce the pollution in our city. [ ]
A. was made
B. be made
C. will be made
D. would be made
