住宅二类物业重点部位的巡查时间间隔，白天不得超过（）小时，夜间不得超过（）小时。
参考答案：4；2
I wonder ____ that got the idea of publishing the Guinness Book of World Records. [ ]
A. who was it
B. who it was
C. it was who
D. whom he was
女性，43岁，因上腹疼痛，恶心、呕吐一天半就诊，诊断为急性坏死性胰腺炎，急诊手术后出现进行性呼吸困难和顽固的低氧血症，采用面罩吸氧，氧流量为8L／min，PaO48mmHg，其抢救应首先采用（）
A.人工膜肺
B.高压氧舱
C.高频通气
D.机械通气，应用PEEP
E.机械通气，应用反比呼吸
