1.Which is NOT a standard PoE power delivery mode?
1.以下哪项不是标准的PoE供电模式？
2.In commercial offices, which punch-down block is commonly used to terminate twisted-pair cables for data and phone wiring?
2.在商业办公场所，通常使用哪种接线端子来端接用于数据和电话布线的双绞线电缆？
3.How are loudspeakers typically specified?
3.扬声器通常如何进行规格描述？
4.How many channels are in Dolby 7.1?
4.Dolby 7.1有多少个声道？
5.Which term is unrelated to sound systems?
5.以下哪个术语与音响系统无关？
6.Two-channel sound system definition?
6.双声道音响系统的定义？
7.Why are directional mics preferred in conference systems?
7.为什么会议系统中更倾向于使用指向性麦克风？
8.In 5.1 home theater, which handle off-screen effects?
8.在 5.1 家庭影院系统中，哪个声道/扬声器负责处理屏幕外的音效？
9.What role do 2-wire to 4-wire hybrid circuits play in telephone lines?
9.2 线到 4 线混合电路在电话线路中起什么作用？
10.In a paging system installed across multiple rooms without individual volume controls on each speaker, which wiring method is generally most effective for maintaining uniform audio from the central amp
10.在安装在多个房间且每个扬声器都没有独立音量控制的分页系统中，哪种布线方法通常最有效地保持中央放大器的音频均匀性？
