反馈型高频正弦波振荡器的平衡条件是 <br/> 得分/总分 A. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/32a61d4dd9c58fa17990e80226d8a97a.jpg"/> B. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/0b7ac97ac1f925e6d42529d219f33580.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/4a2061503463f426c117e436a68adaa3.jpg"/> D. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/5ac6d3fdefafff7cdb6326314dfb1409.jpg"/>