http://www.csbs.edu.hk/officenb/data/2006f4_f7.pdf
或者你可以看这个
http://cache.baidu.com/c?m=9d78d513d9d437a84f9d94690c66c0171e43f7612ba7a3020ed6870fd33a541b0120a1ac26510d199680397001d8181dbab12172405476f08cc8ff1084a6cf7c7bd376632c4c9b1741954ab2cb4427c574964deedb4de2adf045d1f886&p=9c49c916d9c042eb1db0c4710f57&user=baidu
慢慢研究吧
或者你可以看这个
http://cache.baidu.com/c?m=9d78d513d9d437a84f9d94690c66c0171e43f7612ba7a3020ed6870fd33a541b0120a1ac26510d199680397001d8181dbab12172405476f08cc8ff1084a6cf7c7bd376632c4c9b1741954ab2cb4427c574964deedb4de2adf045d1f886&p=9c49c916d9c042eb1db0c4710f57&user=baidu
慢慢研究吧