Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?（） (1) Its discharge is continuous (2) It has no internal valves (3) Upon accidental closing of discharge valve, excessive pressure will not build up<br>A:（1），（2）<br>B:（2），（3）<br>C:（1），（2），（3）<br>D:（2）only

Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?（） (1) Its discharge is continuous (2) It has no internal valves (3) Upon accidental closing of discharge valve, excessive pressure will not build up
A:（1），（2）
B:（2），（3）
C:（1），（2），（3）
D:（2）only

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