It is word puzzle. The correct answer is

来源: sslw 于 2013-08-09 19:16:01 [] [旧帖] [给我悄悄话] 阅读数 : 0 (125 bytes)

You figure out the rule it is not hard. It is not gre related. More like a gam
1. Blade,
2, boat
3, port

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• 你这一说，豁然开朗 -troyviv- ♀ 给 troyviv 发送悄悄话 troyviv 的博客首页 (0 bytes) () 08/10/2013 postreply 20:18:45

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