慢性呼吸衰竭用呼吸兴奋剂时的给氧方法是()
A.给高浓度氧(50%以上)
B.不必给氧
C.给低浓度氧(25%~30%)
D.间断给氧
E.给氧浓度可稍高(40%)
参考答案:E
The hospital _________ well, where many wounded ________every day.
A.is operated; operation
B.operates; are operated on
C.operates; are operated
D.operates; operates on
排气