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ÃÀ¹ú¹ú»áͼÊé¹Ý http://www.coc.gov/ ÃÀ¹ú¹ú¼ÒҽѧͼÊé¹Ý http://www.nlm.nih.gov/ ÃÀ¹ú¹ú¼ÒũҵͼÊé¹Ý http://www.nalusda.gov/ ÃÀ¹úÆÕÁÖ˹¶Ù´óѧͼÊé¹Ý http://infosharel.princeton.edu:2003/ ÃÀ¹ú˹̹¸£´óѧͼÊé¹Ý http://palimpsest.stanford.edu/ ÃÀ¹úÂéÊ¡Àí¹¤Ñ§ÔºÍ¼Êé¹Ý http://libraries.mit.edu/ Ó¢ÓïÔÚÏßд×÷ [ Last edited by jijing1_2001 on 2006-12-10 at 16:37 ] |
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