无相变时在圆形管中强制湍流,对流传热系数 a i 为1000W/(m2.°C)若将水的流量增加1倍,而其他条件不变,则 a i 为( )。
A.
2000
B.
1741
C.
不变
D.
500
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【单选题】On the M53 is a sign ‘ Wa rri ngton 20 ’ . Just over half a mile further on is another sign ‘ Warrington 19'. This is not really surprising, since the distances are rounded to the nearest whole number...