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蝌蚪长成成年青蛙要多久

2025-03-26 07:55:27

推荐回答（1个）

回答1：

小蝌蚪大约经过40天，蝌蚪又发生了一系列的变化：首先长出后肢，然后长出前肢；尾部逐渐缩短，最后消失；内鳃逐渐萎缩、消失，同时，体内形成了肺，转而用肺呼吸；心脏变为二心房一心室，血循环路线由一条变成两条。这时蝌蚪已发育成幼蛙，能够

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