通常冷却塔的冷却方式有几种?
参考答案:
有两种:风冷和水冷。
When _____ your brother usually _____? [ ]
A. do; go home
B. does; go to home
C. do; get to home
D. does; get home
要想准确测量蒸汽流量,必须进行()补偿。