【多选题】
光纤通信有何优点？___（易）（消防通信网络与业务系统管理）
A. 频带宽、通信容量大
B. 传输损耗小，无中继传输距离达200千米
C. 抗电磁干扰能力强，安全性能卓越
D. 体积小、质量轻、耐腐蚀、成本低
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答案
ABC
解析
暂无解析
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直射光其特点是什么？___（难）（基础知识）
A. 在直射光照明下，被摄体上有着明晰的受光面、背光面和影子，从而能突出被摄体的立体形态
B. 直射光照明的受光面和背光面之间的亮度差较小，拍摄出来的景物反差小
C. 直射光照明能表现被摄体清晰的轮廓形态，具有很强的力度感
D. 直射光照明下形成的阴影比较淡，能增加画面的纵深透视感和立体感，有时阴影也是很有表现力的构图因素，能增加画面的感染力
【多选题】
消防通信员技师音视频系统的操作技能要求___（音视频与应急通信管理）
A. 能够掌握图像综合平台的操作使用、配置、维护与故障排查
B. 能够掌握语音综合平台的操作使用、配置、维护与故障排查
C. 能够解决综合性的通信故障
D. 灭火救援指挥系统的安装部署、功能组成、业务流程和故障排查方法
【多选题】
信息安全风险评估与应急处置包括以下哪些知识？___（中）（基础知识）
A. 信息安全风险评估基础
B. 安全措施评估
C. 应急预案编制与应急响应
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公安机关计算机信息系统安全保护工作坚持积极防御、综合防范的方针，坚持安全技术与规范化管理相结合的原则，坚持“专网专用”、“专机专用”的原则，实行___的安全责任制。 （易）(基础知识)
A. “谁管理、谁负责”
B. “谁使用、谁负责”
C. “分级管理，级级负责”
D. “谁管理、谁负责”、“谁使用、谁负责”
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市电电压为_____，频率为_____，周期为_____。___（易）(基础知识)
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B. 220V、50HZ、0.02S、
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【多选题】
现场指挥网要求使用的电台体积小、重量轻、操作简便、工作稳定、可靠、抗干扰性能好，通信范围半径不小于___ （易）(应急通信)
A. 5km、
B. 2.5km、
C. 1km、
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【多选题】
消防通信的任务是___。（中）（基础知识）
A. 接受火灾和其它灾害情况的报告
B. 传输现场所需技术资料，灭火救援方案等辅助火场指挥员决策
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【多选题】
消防三级网适用的范围___。（易）(消防通信网络设备)
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