首先的诊断是
A.凝血功能障碍
B.软产道损伤
C.胎盘残留
D.子宫收缩乏力
E. * * 炎
参考答案:D
We don't have much homework now and our school bags are ______ they used to be. [ ]
A. as heavy as
B. not as heavy as
C. as heavily as
D. not as heavily as
飞机第一次用于战争是第二次世界大战。