string(266) "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%E6%A1%88%E4%BE%8B%E5%88%86%E6%9E%90%E5%87%A0%E9%81%93%E9%A2%98 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
注安考试案例分析几道题
