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某同学在探究“鱼鳍在游泳中的作用 时将鲫鱼的胸鳍和腹鳍捆�好放入水中观察到的现象是 A．只能上浮不能下沉b．游动时鱼体常常侧翻不 Template






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tomski某同学在探究“鱼鳍在游泳中的作用 时将鲫鱼的胸鳍和腹鳍捆�好放入水中观察到的现象是 a．只能上浮不能下沉b．游动时鱼体常常侧翻不 coloring
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