单选题Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）AThe high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pumpBRotary pumps are capable of pumping more fluid than reciprocating pumps of the same weightCRotary pumps occupy only one-half the space of reciprocating pumpsDRotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
单选题
Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）
A
The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump
B
Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight
C
Rotary pumps occupy only one-half the space of reciprocating pumps
D
Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
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