string(260) "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%E5%85%AC%E8%B7%AF%E5%AE%9E%E5%8A%A1%E7%9C%9F%E9%A2%982020%E7%AD%94%E6%A1%88 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
二建公路实务真题2020答案
