该病人不孕的可能原因是：
A．子宫后位B．宫颈炎C．无排卵D．黄体萎缩不全E．黄体发育不全
参考答案：C
It is the ability to do the job _____ matters not where you come from or what you are. [ ]
A. one
B. that
C. what
D. how
工务设备发生故障时应采取什么样的抢修程序？
