井下胶轮车人车乘车人数最多不得超过()人。 ["14","16","20","24"]
利用同一加工方法,加工φ45H7孔和φ50H6孔,应理解为() ["前者加工困难","后者加工困难","两者加工难易相当","无从比较"]
室外直放站的常见问题有() ["自激","上下行不平衡","增益无法调整","输出功率不够"]
对罐笼或带乘人间的箕斗防坠器每天由分工专职人员检查维修()次。 ["1","2","3","4"]
政府行政过程的核心本质是() ["政治性","公共性","统治性","规范性"]
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