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【单选题】
在电视信号传输分配系统中,分配器是用来( )。
A.
放大并补偿线路损耗的部件
B.
进行功率分配的—个部件
C.
串的信号干线中,取出若干支线到用户的输出插孔的部件
D.
调节放大器的输入电平和输出电平的部件
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