string(239) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8C%97%E4%BA%AC%E4%BA%8C%E5%BB%BA%E5%8E%86%E5%B9%B4%E7%9C%9F%E9%A2%98 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
北京二建历年真题
