()对传热过程具有控制性的作用。
A.传热现象
B.流体流动状态
C.流体流动速度
D.传热边界层
参考答案:B
混凝土枕螺栓涂油作业应注意些什么?
The spread of fire is NOT prevented by().
A.shutting off the oxygen supply
B.cooling surfaces adjacent to the fire
C.removing combustibles from the endangered area
D.removing smoke and toxic gases by ensuring adequate ventilation