<p>己知RC无源网络如题19图所示 <img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/7c/d9/7cd9213d2aab2e0bc1179659a777f220.jpg" style="width: 100%;height: auto;"><img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/fa/2d/f