10O2是助燃物，本身不可燃烧。
参考答案：对
The school is divided into two semesters, the first of __________ is September through December, and
the second January through May.[ ]
A. what
B. that
C. which
D. one
某产妇，G5P5，胎儿娩出后 * * 大量流血，胎盘未娩出，手取胎盘失败。
此时最恰当的处理是（）
A.准备子宫切除术
B.行清宫术
C.继续观察
D.再次手取胎盘
E.检查软产道
