【多选题】
在供电线路附近作业时，作业人员必须佩戴的防护用品有（）。___
A. 安全帽
B. 绝缘手套
C. 绝缘鞋
D. 绝缘工具
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ABCD
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在光纤通信技术中，进行光纤线路连通性测量，光源是不可缺少的信号源，下列能产生光源的仪表有()。___
A. 稳定光源
B. 笔式红光源（红光笔）
C. ODTR
D. 光功率计
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在一个广播域中，IP地址和MAC地址的对应关系正确的是（）。___
A. 一个MAC地址可以对应多个IP地址
B. 一个IP地址可以对应多个MAC地址
C. 一个IP地址只能对应一个MAC地址
D. 一个MAC地址只能对应一个IP地址
【多选题】
直埋光缆通信线路的防雷措施有（）___
A. 光缆的金属护层或铠装层不作接地，使之处于浮地状态
B. 光缆的金属护套(或铠装)、金属加强芯，在接头处两侧各自断开，不作电气连通
C. 在光缆上方敷设排流线。
D. 光缆的金属护层或铠装层每隔1000米作接地处理。
【多选题】
中移铁通家客装维服务满意度提升指导意见中，加强新装投诉率指标的推行力度中的两率是指___
A. 30天新装投诉率
B. 20天新装投诉率
C. 15天新装投诉率
D. 5天新装投诉率
【简答题】
某张装机工单竣工后，客服人员在回访用户过程中，用户不清楚装维人员是否穿工作服、带工作牌；没有要求装维人员清理垃圾；主动要求装维人员不用穿鞋套进屋；由于时间关系装机完成后用户就匆忙离开了。该装维人员的工作中存在哪些问题？
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