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科研常用的八个搜索引擎
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2楼2005-06-29 16:31:53
3楼2005-12-17 17:09:42
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4楼2005-12-17 18:44:20
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http://www.search4science.com/ Search4science has closed down its search facility: Our Dynamic Search and Direct Search will be out of service for some time together with the rest of the main site. This is due to upgrades and new partner co-operations. We hope to be back in a short time. In the mean time our Company Information site will be up and running so please come back here for more information. |
5楼2005-12-17 20:24:51
