用BT-3型扫描仪测量一网络,当扫频信号“输出衰减”为0dB时,网络输出的曲线在屏幕上显示为6格,若检波探头直接格扫频输出短接“输出衰减”为12dB时,屏幕上的电压线是6格,则网络的()。
A. 增益是12dB
B. 衰减12dB
C. 增益是0dB
D. 增益是6dB
听力原文: The Foxley Halls complex boasts a reputation for service and excellence second to none. We offer all the facilities you will need and are within easy access to all major routes. We have ample car parking, superb catering and all this in the traditional surroundings of a historical setting and relaxing country side. Impress your clients, stimulate your trainees or simply provide a beautiful background to display your products.
(15)
遥控彩色电视机亮度调节是受()控制的。
A. 中央微处理器
B. 手动
C. 亮度放大器
D. 行扫描电路
巡视工作人员对应当发现的重要问题没有发现的,视情节轻重,给予批评教育.组织处理或者纪律处分;涉嫌犯罪的,移送司法机关依法处理。()