1.On a telephone line, which device is used to strengthen signals and compensate for signal loss?
1.在电话线路上，哪种设备用于增强信号并补偿信号损耗？
2.What is a key advantage of Power over Ethernet (PoE) for devices like IP cameras or VoIP phones?
2.对于IP摄像机或VoIP电话等设备，以太网供电 (PoE) 的主要优势是什么？
3.Which letter represents ohms?
3.哪个字母代表欧姆？
4.Which of the following is NOT reported by an HDMI EDID (Extended Display Identification Data)?
4.以下哪项不是HDMI EDID（扩展显示标识数据）报告的内容？
5.After setting up a projector, screen, and surround sound, what should be your first step?
5.设置好投影仪、屏幕和环绕声系统后，您的第一步应该是什么？
6.In an RS232 connection between AV components (receiver, projector, media player), which pins carry data?
6.在音视频组件（接收器、投影仪、媒体播放器）之间的 RS232 连接中，哪些引脚传输数据？
7.A client needs a CCTV camera to cover an outdoor area measuring at least 77 feet wide by 98 feet high from a distance of 100 feet. The camera uses a 1/2.7＂ CMOS sensor. Based on the provided lens fie
7.客户需要一台闭路电视摄像机，用于覆盖距离 100 英尺处至少 77 英尺宽、98 英尺高的室外区域。该摄像头使用 1/2.7 英寸 CMOS 传感器。根据提供的镜头视场角图表，应选择哪种焦距的镜头才能拍摄到整个区域？
8. How many loudspeakers rated at 8 ohms must be wired in parallel to correctly match a 4-ohm amplifier load?
8.要使 8 欧姆扬声器与 4 欧姆放大器负载正确匹配，需要将多少个 8 欧姆扬声器并联连接？
9.When planning smart home device installation, like a home theater or security camera in a garage, what is the initial step?
9.在规划智能家居设备安装时，例如在车库安装家庭影院或安全摄像头，第一步是什么？
10.Which network addressing method is best suited for deploying a VoIP system?
10.哪种网络寻址方法最适合部署 VoIP 系统？
