string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E5%B7%A5%E7%A8%8B%E7%BB%8F%E6%B5%8E%E4%B8%80%E5%BB%BA%E7%9C%9F%E9%A2%98 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2020工程经济一建真题
