高堆作业人员,不准站在距堆沿()厘米以内操作,防止倒堆、碰撞和滑跌等事故。 ["50","100","150"]
在()转速下,最佳点火提前角是随发动机负荷的增加而减小。 ["增大","同一","减小","波动"]
下面哪些人是北京城的规划和建设者() ["张浩","刘秉忠、郭守敬、也黑迭儿","蒯祥","样式雷"]
夹紧机构装配不良,会使其变形损坏或丧失原有的() ["功能","装配精度","减小","丧失"]
依火花塞的电极间隙是()mm。 ["0.7-0.8","0.8-0.9","1.0-1.1","1.1-1.2"]
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