SF6湿度检测时,要求温度计应具有流量调节功能,不超过()L/min。
A.0.5
B.1
C.1.5
D.2
参考答案:B
This book is said to be a special one, which __________many events not found in other history books.
A.writes
B.refers
C.deals
D.covers
Ⅱ型呼吸衰竭的血气分析特点是PaO2小于______mmHg,同时伴有PaCO2大于______mmHg。