气压机入口入火炬阀为（）闸阀，是属（）阀
参考答案：风动、风关
The twins are similar each other. [ ]
A. to
B. about
C. at
D. for
虚喘发生的病机是
A．肺气虚弱
B．肝阴不足
C．肺肾阴虚
D．肾阳衰弱
