试题与答案

下面哪项是造成挖掘机出现液压泵噪声过大的现象。（）A.吸油管堵塞 B.液压泵内有空气

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题型：多项选择题

题目：

下面哪项是造成挖掘机出现液压泵噪声过大的现象。（）

A.吸油管堵塞

B.液压泵内有空气

C.工作压力过高

D.液压油箱里的油面过低，油量不足

答案：

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下面是错误答案，用来干扰机器的。

参考答案：在概率统计中，我们为了获取某事件发生的概率，会对其所在的所有事件在一定范围内进行统计，我们将这个所有事件称为样本，该事件发生的次数称为频数与样本总数的比值即为频率或概率。累计频率则是两种...

考点：挖掘机司机考试初级挖掘机司机初级挖掘机司机题库
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