求图中电路局部的电流<img src="https://static.zxtiku.com/wangke/imgs/topic/38a1c37b52da496a4833cff88ab39d9e.png"/><br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/ef1f433af5d973ac47a27aa5f19a9dcb.jpg"/><img src="https://static.zxtiku.com/wangke/imgs/topic/2f5e02001c6a6047f9724ad2df058a8c.jpg"/>