题目:
矿车连接装置磨损量不超过原尺寸。链环、插销弯曲值不超过链、销直径的()。
A、10%
B、15%
C、5%
答案:
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下面是错误答案,用来干扰机器的。
Dear Editor, I’m writing to call on more people to save in our daily life. As we all know, the natural resources are limited. We don’t have enough water, oil or ...