string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E7%BD%91%E4%B8%8A%E6%8E%88%E8%AF%BE%E5%B9%B3%E5%8F%B0%E5%93%AA%E4%B8%AA%E5%A5%BD => Failed to connect to 61.171.74.35 port 38027: Connection refused"
一建网上授课平台哪个好
