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1.很多鱼可以倒着游（蝴蝶鱼），有些还可以垂直游（带鱼）。2、长颈鹿：偶蹄目长颈鹿科；鹿：偶蹄目鹿科
bingle
(bingle)
(#256708@0)
Last Updated: 2001-11-10
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很认真地请教: 1. 鱼是否会倒着游? 2. 长颈鹿是不是鹿科(或者鹿类的)? 谢谢
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