题目内容：
以下关于宽带高频功率放大器的描述中正确的是（）
A.宽带高频功放可以工作在甲类、乙类、丙类状态
B.宽带高频功放的负载可以是电阻或谐振滤波电路
C.宽带高频功放的负载必须有一定的滤波能力
D.宽带高频功放的效率较低
参考答案：
选择题：以下关于宽带高频功率放大器的描述中正确的是（）
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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