string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B9%B4%E4%B8%80%E9%80%A0%E6%A1%88%E4%BE%8B%E7%AC%AC%E4%B8%80%E9%A2%98 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
2020年一造案例第一题
