[img=http://img.bbs.csdn.net/upload/201411/11/1415687712_251287.jpg][/img]，点击“确定”时，提示说“”此扩展名已被使用，请输入另一个扩展名”，请问这是怎么回事？？？？？
![http://img.bbs.csdn.net/upload/201411/11/1415687712_251287.jpg][/img]，点击“确定”时，提示说“”此扩展名已被使用，请输入另一个扩展名”，请问这是怎么回事？？？？？](http://img.bbs.csdn.net/upload/201411/11/1415687712_251287.jpg%5D%5B/img%5D%EF%BC%8C%E7%82%B9%E5%87%BB%E2%80%9C%E7%A1%AE%E5%AE%9A%E2%80%9D%E6%97%B6%EF%BC%8C%E6%8F%90%E7%A4%BA%E8%AF%B4%E2%80%9C%E2%80%9D%E6%AD%A4%E6%89%A9%E5%B1%95%E5%90%8D%E5%B7%B2%E8%A2%AB%E4%BD%BF%E7%94%A8%EF%BC%8C%E8%AF%B7%E8%BE%93%E5%85%A5%E5%8F%A6%E4%B8%80%E4%B8%AA%E6%89%A9%E5%B1%95%E5%90%8D%E2%80%9D%EF%BC%8C%E8%AF%B7%E9%97%AE%E8%BF%99%E6%98%AF%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B%EF%BC%9F%EF%BC%9F%EF%BC%9F%EF%BC%9F%EF%BC%9F){kind=link}