http://www.khdaw.com/bbs/attachment.php?aid=3259&k=f20d63a3ebe8dc609e3ad8a8e04e8b60&t=1243928000&ck=92e51d5d&sid=ca03d9CDCxOR6Yva64UubMas/zMn5WSTRCEQ+GbPbEpBSrU
给出题目 我可以直接帮你做