气动薄膜式调节阀接受的信号压力和弹簧的反作用力相平衡时，推杆即稳定在一个位置上，这就是气动薄膜式调节阀的工作原理。
参考答案：对
公司利润是指公司在一定会计期间的经营成果。根据《公司法》以及有关规定，进行利润分配首先应用于( )。
A．向股东分配利润 B．提取公积金C．缴纳所得税 D．弥补以前年度的亏损
While assessing a 2-month-old child's airway, the nurse finds that the child isn't breathing. After two unsuccessful attempts to establish an airway, the nurse should
A．attempt rescue breaths.
B．attempt to reposition the airway a third time.
C．administer five back blows.
D．attempt to ventilate with a handheld resuscitation bag.
