我这里有一篇文章不知道对你有用吗?有用的话就给我加点分啊,没有用的话就算了.http://adrem.org.cn/Faculty/ShiPJ/articals/%BD%FC50%C4%EA%C0%B4%D6%D0%B9%FA%C9%B3%B3%BE%B1%A9%BF%D5%BC%E4%B7%D6%D2%EC%B8%F1%BE%D6%BC%B0%BC%BE%CF%E0%B7%D6%B2%BC.PDF
