探究鱼鳍在游泳中的作用实验得出结论1将鱼的胸鳍或腹鳍捆�固定后鱼体 不能掌握平衡可见胸鳍或腹鳍起 作用胸鳍还有转换方�的作用 Template




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tomski探究鱼鳍在游泳中的作用实验得出结论1将鱼的胸鳍或腹鳍捆�固定后鱼体 不能掌握平衡可见胸鳍或腹鳍起 作用胸鳍还有转换方�的作用 coloring