string(276) "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%9F%BF%E4%B8%9A%E5%B7%A5%E7%A8%8B%E7%9C%9F%E9%A2%98%E7%AD%94%E6%A1%88%E8%A7%A3%E6%9E%90 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
二建矿业工程真题答案解析
