分析功率放大器时通常采用图解法，而不能采用微变等效电路。
参考答案：对
Take time lo relax by listening to music, reading a book or just spending some time alone.
Relaxing allows you _______ to your students with more energy. [ ]
A. return
B. to return
C. returning
六一散的组成、功用及主治是什么？临床的主要衍生方剂又哪些？
