双侧肺大泡破裂患者人工通气时,气道压力不应超过()
A.10cmH2O
B.15cmH2O
C.20cmH2O
D.25cmH2O
E.30cmH2O
参考答案:B
在生物分类单位中,最大的分类单位是( )
A.门
B.纲
C.界
D.种
It’s really ________ when a train is late and there’s no explanation.[ ]
A. annoying
B.annoyed
C.annoy
D.being annoyed