如图所示鸟的结构图请据图说明鸟类适于飞行的特点.1图1表示鸟的外形是流线型2图2表示鸟的前肢形成了翼3图3表示鸟的胸肌�达 Template




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tomski如图所示鸟的结构图请据图说明鸟类适于飞行的特点.1图1表示鸟的外形是流线型2图2表示鸟的前肢形成了翼3图3表示鸟的胸肌�达 coloring