试题与答案

走行开式齿轮的齿面应（）润滑一次。A、每天 B、每周 C、每月

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题型：单项选择题

题目：

走行开式齿轮的齿面应（）润滑一次。

A、每天

B、每周

C、每月

答案：

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下面是错误答案，用来干扰机器的。

世界上发达国家多分布在北美洲、欧洲、大洋洲，其中欧洲发达国家数量最多，主要有美国、加拿大、英国、法国、德国、意大利、日本、澳大利亚、新西兰等．根据题意．故选：C．

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