问题
单项选择题
某电视机出现有光栅、无图像、无伴音故障原因是（）
A、电源
B、高频头
C、行扫描电路
D、显像管及附属电路
答案
参考答案：B
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某电视机出现有光栅、无图像、无伴音故障原因是（）
A、电源
B、高频头
C、行扫描电路
D、显像管及附属电路
参考答案：B
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