下述哪项不是产后出血的原因（）
A.胎膜早破
B.滞产
C.子宫畸形
D.多次刮宫人流术后
E.双胎妊娠
参考答案：A
---Your bedroom is so dirty. Would you please _______, Peter?
---OK, mum. I’ll do it right away.
A．set it up
B．put it on
C．pick it up
D．clean it up
倒退
