肺水肿患者吸氧时湿化瓶内用()。
A.冷开水
B.蒸馏水
C.5%~20%乙醇
D.20%~30%乙醇
E.75%乙醇
参考答案:D
劳动定额制定基本要求是多方面的,其关键是()。教材第80页
A.快
B.准
C.全
D.多
Which of the following is more suitable for bagged cargo?().
A.Hydraulically operated pusher
B.Spread beam sling
C.Revolving roll clamping device
D.Platform sling