区间隧道机械通风主要设备有隧道风机、推力风机（）及相关的电动风阀。
A.射流风机
B.轨道排风机
C.电动风阀
D.防火阀
参考答案：A
The government announced that six highways by the end of last year.
A．built
B．had built
C．have been built
D．had been built
痰湿内阻者可见
A．头晕面白，腰膝冷痛B．头晕面白，神疲体倦C．头晕刺痛，痛有定处D．头晕且重，如物裹缠
