【单选题】病人赵某,女,67岁,因肺源性心脏病收入院,护士巡视病房时,病人有明显的呼吸困难及口唇发绀,血气分析:PaO2为45mmHg,PaCO2为60mmHg。当PaO2低于下列哪项值时,可作为用氧指标
【单选题】“马”字中,横折1与横折折钩2长度作比较,哪个笔画长?( )
【判断题】图形算量软件中,现浇板只有成为阳台、飘窗等组合构件中的一部分时,才会套取投影面积的工程量
【单选题】He’s got himself into a dangerous situation ________ he is likely to lose control over the plane.
【单选题】He has got himself into a dangerous situation _____ he is likely to lose control over the plan. [ ]