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Animalsseemtohavethesensetoeatwhentheyarehungryandtheyd...
問題詳情:Animalsseemtohavethesensetoeatwhentheyarehungryandtheydonoteatmorethantheirbodiesneed.Ithasbeenshownthatratswill,whengivenachoiceoveraperiodoftime,preferwaterwithvitamins(維生素)towaterwithout...
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