单选题A pump is defined as device that（）Aproduces pressureBimparts energy to a fluid to move it from level ‘A’ to level ‘B’Ccreates a vacuum to move a liquid in all installationDis to develop a pressure differential
单选题
A pump is defined as device that（）
A
produces pressure
B
imparts energy to a fluid to move it from level ‘A’ to level ‘B’
C
creates a vacuum to move a liquid in all installation
D
is to develop a pressure differential
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