合金结构钢“9Mn3V”的含碳量为() ["9%","0.9%","0.09%"]
发现气管插管的导管堵塞,患者sp02直线下降,吸痰管插入困难,给予简易呼吸气囊通气挤捏球囊感到阻力很大时,应立即() ["拔出气管导管,视病情给予重新插管或鼻导管吸氧","调高氧浓度","改变呼吸机参数","给气囊充气","胸外按压"]
电气安装接线图在绘制时,各电器不画实体,以()符号代表。 ["图形","文字","数字","字母"]
发现气管插管患者有分泌物、痰或血块阻塞导管时,应立即() ["吸痰","止血","调高氧浓度","禁食","拔除气管插管"]
LKJ监控主机供给显示器的电源为()V。 ["A、DC24V","B、DC50V","C、DC110V","D、DC15V"]
HART通信协议要求最小负荷电阻为()欧。