【单选题】间壁式换热器传热速率 = 传热推动力 / 传热阻力,其中传热推动力是 ............... ( )
【单选题】人们对需要的解释目前接受最广泛的是()
C.
大卫·麦克莱兰(David McClelland)等人的三种需要理论
【简答题】Edward Snowden was on a plane bound to Moscow when he got to know that his passport had been revoked (吊销) by the US government.
【单选题】产品的产量x(千件)与单位产品成本y(元)之间的回归方程为y=110 -6.57x,这意味着产量每提高一个单位(千件),成本就( )。
【单选题】Then NSA contractor Edward Snowden managed to download thousands of secret files from a server in Hawaii.
A.
a person or thing that provides a service or commodity
B.
a computer or computer program which manages access to a centralized resource or service in a network
C.
the player who serves in tennis and other racket sports
【单选题】产品的产量 X (千件)与单位产品成本 y (元)之间的回归方程为 y = 200 – 7.28x, 这意味着产量每提高一个单位(千件),成本就( )。
【单选题】对流传热速率 = 对流传热系数×传热面积×传热推动力,其中传热推动力是指
【单选题】对流传热速率与传热推动力成正比,其中推动力是( )
【单选题】人们对需要的解释目前接受最广泛的是()
B.
大卫·麦克莱兰(David McClelland)等人的三种需要理论
【判断题】对流传热速率=系数推动力,其中传热推动力是两流体的温度差。