string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%AE%89%E8%80%83%E8%AF%95%E7%AD%94%E6%A1%88%E5%8F%8A%E8%A7%A3%E6%9E%90 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
注安考试答案及解析
