下列说法中不能够体现出生物体的结构与功能相适应的是 A.鱼鳔调节身体比重b.鱼体表粘�以减�阻力c.鸟类的骨骼中空以减轻体重d.鱼鳍能 Template


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tomski下列说法中不能够体现出生物体的结构与功能相适应的是 a.鱼鳔调节身体比重b.鱼体表粘�以减�阻力c.鸟类的骨骼中空以减轻体重d.鱼鳍能 coloring