string(274) "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%E6%9C%BA%E7%94%B5%E5%93%AA%E4%B8%AA%E8%80%81%E5%B8%88%E8%AE%B2%E5%BE%97%E6%9C%80%E5%A5%BD => Failed to connect to 14.18.117.71 port 38220: Connection refused"
一建机电哪个老师讲得最好
