3．李东将鲫鱼的背鳍剪去在把鲫鱼放入水中观察�现鱼可以游泳但行进路线异常鱼体失去平衡而侧翻说明背鳍的主要作用是 A．保持身体平衡 Sketch Coloring Page

3．李东将鲫鱼的背鳍剪去在把鲫鱼放入水中观察�现鱼可以游泳但行进路线异常鱼体失去平衡而侧翻说明背鳍的主要作用是 A．保持身体平衡 Template

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tomski3．李东将鲫鱼的背鳍剪去在把鲫鱼放入水中观察�现鱼可以游泳但行进路线异常鱼体失去平衡而侧翻说明背鳍的主要作用是 a．保持身体平衡 coloring

李东将鲫鱼的背鳍剪掉再把鲫鱼放入水中观察�现鲫鱼仍可游泳但鱼体不断由于横�水流的冲击而�生侧翻这说明背鳍的作用主要是A．保持身体平衡B sketch template

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鲫鱼解剖解剖图千图� sketch template

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3．李东将鲫鱼的背鳍剪去在把鲫鱼放入水中观察�现鱼可以游泳但行进路线异常鱼体失去平衡而侧翻说明背鳍的主要作用是 A．保持身体平衡 sketch template

3．李东将鲫鱼的背鳍剪去在把鲫鱼放入水中观察�现鱼可以游泳但行进路线异常鱼体失去平衡而侧翻说明背鳍的主要作用是 A．保持身体平衡 sketch template

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如图为鲫鱼外形图请据图回答1“鱼儿离不开水 这是因为鱼用鳃�吸．2鲫鱼的体表有鳞片覆盖．3鲫鱼身体两侧大多有2侧线能 sketch template

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