string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E6%B3%A8%E5%8D%8F%E5%8E%86%E5%B9%B4%E7%9C%9F%E9%A2%98%E6%B1%87%E7%BC%96 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
中注协历年真题汇编
