煤气热风炉点火开工前应先开热风机清扫炉爣。
参考答案：对
— Bill, if it doesn’t rain, we can go straight on and spend more time in Vienna.—__________ I just want to hear Mozart.
A．Well done!
B．No problem
C．That’s great!
D．That’s it.
磨煤机齿轮油箱润滑油冷却器的冷却水来至哪里？
