下了好几个版本，连知名不知名网站都连不上？都是[CRITICAL] unable to connect to the target URL ('')　为何？？？

D:\360\sqlmap\sqlmap>python sqlmap.py -u "http://www.ｘｘ.cn/Article/default.aspx?type=40"

        ___

       __H__

 ___ ___["]_____ ___ ___  {1.1.3.14#dev}

|_ -| . [,]     | .'| . |

|___|_  [(]_|_|_|__,|  _|

      |_|V          |_|   http://sqlmap.org

[!] legal disclaimer: Usage of sqlmap for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program

[*] starting at 14:46:34

[14:46:34] [INFO] testing connection to the target URL

[14:46:34] [CRITICAL] unable to connect to the target URL (''). sqlmap is going to retry the request(s)

[14:46:34] [WARNING] if the problem persists please check that the provided target URL is valid. In case that it is, you can try to rerun with the switch '--random-agent' turned on and/or proxy switches ('--ignore-proxy', '--proxy',...)

[14:46:34] [CRITICAL] unable to connect to the target URL ('')

[*] shutting down at 14:46:34

D:\360\sqlmap\sqlmap>

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