【判断题】当间壁两侧对流传热膜系数相差很大时,传热系数K接近于较大的膜系数。
【单选题】When invited out for 'supper' a few weeks later, the writer______.
A.
expected to be served a proper dinner
B.
arrived on the wrong evening
C.
interpreted the invitation correctly this time
D.
realized there was no dinning-room in the cottage
【单选题】When invited for a dinner, start eating when:
B.
any one starts eating.
D.
guest of honor starts.
【简答题】当间壁两侧冷,热流体的对流传热膜系数α相差很大时,传热系数接近于()一侧的α值。
【单选题】当间壁两侧对流传热膜系数相差很大时,传热系数 K 接近于( )的对流传热系数。
【判断题】当间壁两侧对流传热膜系数相差很大时,传热系数K接近于较大的膜系数。
【判断题】当间壁两侧对流传热服系数相差很大时,传热系数k接近于较大的膜系数。
【单选题】当间壁两侧对流传热膜系数相差很大时,传热系数Κ接近于( )。
【单选题】某墙背倾角α为10°的仰斜挡土墙,若墙背与土的摩擦角δ为10°,则主动土压力合力与水平面的夹角为()。