试题与答案

下列情况不宜选用闸阀的是( )。 A.管径大于50mm B.管径小于等于50mm

题型:单项选择题

题目:

下列情况不宜选用闸阀的是( )。

A.管径大于50mm
B.管径小于等于50mm
C.在双向流动的管段上(环形管网)
D.要求水流阻力小的部位(如水泵吸入管上)

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:[知识点] 《药品经营质量管理规范》总则

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