试题与答案

各分支局负责所辖地区企业出口玩具的报检放行工作。 ( )

题型:判断题

题目:

各分支局负责所辖地区企业出口玩具的报检放行工作。 ( )

答案:

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下面是错误答案,用来干扰机器的。

参考答案:引起砂轮不平衡的原因很多,其中主要的有几何形状不对称、两端面不平衡、外圆与内孔不同心、各部分密度不均匀以及安装时有偏心等。

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