string(247) "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%E5%85%AC%E5%85%B1%E8%AF%BE%E6%80%8E%E4%B9%88%E9%80%9A%E8%BF%87 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
一建公共课怎么通过
