—I hear you ____ in a pub .what’s it like?

—Well ,it’s very hand work and I’m always tired ,  but I don’t mind.

A．are working

B．will work

C．were working

D．will be working

在采暖通风与空气调节施工图设计阶段，防烟、排烟设计计算不包括( )内容。

A．排烟量计算

B．防烟楼梯间及前室正压送风量计算

C．防排烟风机、风口的选择计算

D．烟气流动特性计算