这里有资料:http://cache.baidu.com/c?word=%B1%EA%D7%BC%3B%BB%F4%B7%F2%C2%FC%3B%C2%EB%B1%ED%2Cjpeg&url=http%3A//web%2Entit%2Eedu%2Etw/%7Ewpin/Multimedia/JPEG%2Eppt&b=0&a=42&user=baidu