试题与答案

Centrifugal pumps have what advantage(s) o

题型:单项选择题

题目:

Centrifugal pumps have what advantage(s) over reciprocating pumps?().

A.They are less expensive

B.They are smaller for equivalent pumping ability

C.They pump more cargo in less time

D.All of the above

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错解析:土地面积的量算有三种方法,包括实地量距法、坐标解析法和图解计算法。

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