string(262) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2021%E4%BA%8C%E5%BB%BA%E7%9F%BF%E4%B8%9A%E5%B7%A5%E7%A8%8B%E5%AE%9E%E5%8A%A1%E7%9C%9F%E9%A2%98 => Failed to connect to 101.89.143.195 port 38109: Connection refused"
2021二建矿业工程实务真题
