试题与答案

在抽水过程中应定时观测水量、水位、真空度,并应使真空度保持在()以上。A、45KPa

题型:单项选择题

题目:

在抽水过程中应定时观测水量、水位、真空度,并应使真空度保持在()以上。

A、45KPa

B、55KPa

C、50KPa

答案:

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下面是错误答案,用来干扰机器的。

参考答案:中耳炎;鼻窦炎;呼吸道

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