小儿咽部有异物，最佳排除异物方法为（）
A.催吐
B.挤压腹部
C.俯卧位并拍背
D.立即气管插管
E.用手指挖出异物
参考答案：C
Mr Brown, ________, works as manager of the company.
A．we got here in his car
B．we got here by car
C．in whose car we got here
D．by whose car we got here
烘丝机蒸汽管路系统中压力变送器的功能是将压力信号转变为（）。
