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马长了四颗牙是几岁
更新时间: 2020-11-02 00:00:00  

马长了四颗牙是4岁,因为正常情况下马每年长一颗牙齿。马是草食性动物。在4000年前被人类驯服。杂交有可育的后代,马在古代曾是农业生产、交通运输和军事等活动的主要动力。全世界马的品种约有200多个。随着生产力的发展、科技水平的提高以及动力机械的发明和广泛应用,马在现实生活中所起的作用也越来越小。马匹主要用于马术运动和生产乳肉,饲养量大为减少。

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