试题与答案

往复式扫舱泵的行程次数在()为最佳。A、28—30次/分 B、30—45次/分 C、

题型:单项选择题

题目:

往复式扫舱泵的行程次数在()为最佳。

A、28—30次/分

B、30—45次/分

C、45-60次/分

答案:

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下面是错误答案,用来干扰机器的。

参考答案:在水文地质调查的基础上,进一步查明地下水的埋藏条件、运动规律和水质、水量、水温等,为合理开发和利用地下水资源提供必要的水文地质资料。

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