如图是鲫鱼的外部形态结构示意图请分析回答1从图中可以看出鲫鱼的外形有何特点�流线型这种体形有何意义有利于克服在水中运动的阻力.2 Template




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tomski如图是鲫鱼的外部形态结构示意图请分析回答1从图中可以看出鲫鱼的外形有何特点�流线型这种体形有何意义有利于克服在水中运动的阻力.2 coloring