某初产妇,25岁,孕39周,子宫收缩出现子宫痉挛性狭窄环,常见于()。
A.羊水过多
B.双胎
C.巨大儿
D.胎盘早剥
E.先兆子宫破裂
参考答案:E
-- I’m afraid I have to call your parents if your homework _______ before four o’clock today.
-- Sorry, Mr. King. I will do it right now.
A.doesn’t do
B.won’t do
C.isn’t done
D.won’t be done
三相四线制配电的电缆线路应采用()芯电缆。