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恐龙为什么消失了呢

更新时间: 2020-11-12 00:00:00     

有很多种有人说是火山爆发,使空气中弥漫许多的火山灰,使恐龙窒息死亡。还有人说,恐龙的灭绝是因为小型星撞击地球,使恐龙灭绝的。跟有科学家说是因为当时的环境差异大,恐龙无法生存,所以演化成为其他的动物等等,具体是怎灭亡的至今还是个谜.

关键词: 恐龙 为什么 消失

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