胎儿窘迫的病因涉及多方面，主要有_______、______，______、______。
参考答案：母体因素；脐带胎盘因素；胎儿因素；难产处理不当
人民调解中的调解会由( )主持。
A．调解委员B．调解委员会 * * C．调解委员长D．法官
—Shall we go skating or stay at home?
—Which ___ do yourself? [ ]
A. do you rather
B. would you rather
C. will you rather
D. should you rather
skating or stay at home?