差压传感器的左边进压口的压力范围p1=0.9~1.1MPa,右边进压口的压力范围p2=0.9~1.0MPa,求:p1与p2的差压Δp的范围(也就是该差压传感器的压力范围)。
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测得某管道内部的被测液体平均流速为0.5m/s,密度为1000kg/m3,管道的直径为2m,求:1)管道的截面积A为多少平方米?2)瞬时体积流量qV为每秒多少立方米?3)瞬时质量流量qM为为每秒多少吨?
Warehouses are large complicated buildings which look like barns.
A. 对
B. 错
Transshipment warehouses provide places for the storage of raw materials.
A. 对
B. 错
Supply warehouses can be used to store the finished products.
A. 对
B. 错