If you have got _____temperature without coughing, perhaps you have caught _____cold. Just stay in _____bed. Don’t think that you have got SARS?

A．the; the; /

B．a; a; /

C．a; the; the

D．a; a; the

机械防排烟系统主要由（）组成。

A.排烟风机

B.排烟阀

C.正压送风机

D.防火阀