子痫病人护理中不妥的是
A．床边应加床档B．动作要轻巧C．保持呼吸道通畅D．协助病人多翻身、防止褥疮发生E．平卧、头偏向一侧
参考答案：D
The research project has only been under way for three months,so it's too early to___ its success. [ ]
A. convey
B. evaluate
C. tend
D. stress
开关大修充入SF6气体至额定压力后，要经过（）小时才能进行SF6气体微水测量。
A.12
B.24
C.36
D.48
