string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9F%AD%E8%B7%AF%E5%92%8C%E6%96%AD%E8%B7%AF%E7%9A%84%E7%94%B5%E8%B7%AF%E5%9B%BE%E6%80%8E%E4%B9%88%E7%94%BB => Failed to connect to 101.89.117.144 port 38005: Connection refused"
短路和断路的电路图怎么画
