string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2020%E4%BA%8C%E5%BB%BA%E8%80%83%E8%AF%95%E7%9C%9F%E9%A2%98%E8%A7%A3%E6%9E%90 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
2020二建考试真题解析
