1.In surveillance systems, PTZ stands for:
1.在监控系统中，PTZ 代表什么？
2.Which sensor type is commonly used on doors?
2.哪种传感器类型常用于门上？
3.Modern hybrid analog CCTV systems:
3.现代混合模拟CCTV系统：
4.Feature that adjusts image for backlit subjects:
4.调整背光主体图像的功能：
5.Sensor detecting motion via far-infrared changes:
5.通过远红外变化检测运动的传感器：
6.High-sensitivity camera improvement:
6.高灵敏度摄像机的改进：
7.Depth of field in surveillance:
7.监控中的景深：
8.What is the NTSC-based QCIF analog video resolution?
8.基于 NTSC 的 QCIF 模拟视频分辨率是多少？
9.In satellite dish alignment, what does “elevation” indicate?
9.在卫星天线对准中，“仰角”表示什么？
10.Which is an example of a network-powered broadband communication system?
10.以下哪项是网络供电宽带通信系统的示例？
