string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E7%9C%9F%E9%A2%98%E8%A7%A3%E6%9E%90%E5%8F%8A%E7%AD%94%E6%A1%88%E8%AF%A6%E8%A7%A3 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
二建真题解析及答案详解
