什么是清晰度？什么是分解力？
参考答案：
清晰度：主观感觉到图象呈现细节的能力分解力：系统传送图象细节的能力
电视显象管的作用是[ ]
A．只把电信号还原为声信号
B．只把电信号还原为图象信号
C．同时把电信号还原为声信号和图象信号
D．向外发射电磁波
He was fined $5,000 by city regulators for giving money to an inspector, an incident he later described as ______ .
A．extent B．extinction C．extortion D．extravagance
