string(284) "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%9C%9F%E9%A2%98%E5%88%B7%E9%A2%98%E8%BD%AF%E4%BB%B6%E6%9C%89%E9%94%99%E9%A2%98%E8%A7%A3%E6%9E%90 => Failed to connect to 101.91.112.32 port 38162: Connection refused"
二建真题刷题软件有错题解析
