给肺炎患儿定时拍背的目的不包括()
A.可减轻肺部瘀血
B.有利于痰液咳出
C.预防压疮
D.保持呼吸道通畅
E.有利于排出胃内空气,防止溢奶
参考答案:C, E
安装在用户处的35kV以上计费用电压互感器二次回路,应不装设隔离开关辅助触点,但可装设熔断器。
The Unified Modeling Language is a standard graphical language for modeling object-oriented software()can show the behavior of systems in terms of how objects interact with each other.
A.Classdiagram
B.Componentdiagram
C.Sequencediagram
D.Use case diagram