重症新生儿呼吸窘迫综合征应用呼吸机辅助通气模式一般用()
A.CPAP
B.IPPV
C.IPPV+PEEP
D.PEEP
E.PEEP+CPAP
参考答案:C
______ necessary for us _______ English well. [ ]
A. This is; to learn
B. It's; to learn
C. It's; learn
施工升降机操作按钮中,()必须采用非自动复位型?
A.上升按钮
B.下降按钮
C.停止按钮
D.急停按钮