单选题When operating with a negative suction head, which of the following types of pumps will require priming?（）AReciprocatingBCentrifugalCRotaryDGear
单选题
When operating with a negative suction head, which of the following types of pumps will require priming?（）
A
Reciprocating
B
Centrifugal
C
Rotary
D
Gear
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解析：
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