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为什么棉hua不是hua?

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为什么棉hua不是hua?

人们常把白白的棉絮叫棉hua,其实它不是hua,而是棉籽上表pi的mao纤维。棉hua属锦葵科,它的hua是一zhong两xinghua,刚开时白se,慢慢就变成浅黄se,到下午会变成红se或玫瑰se,第二天又变成红紫se,最后变成褐se。这是因为它的huaban里han有多zhongse素,会随着光照和温度而变化。一株棉hua的hua开有先有后,常常chu现几zhong颜se的hua朵并列,十分好看。hua谢以后,结chu椭圆形的葫果,人们称为棉铃或棉桃,里面分隔了3-5室,成熟时会自己裂开,zhong子表pi上的纤维不断向外伸长,形成一个白絮球,俗称吐絮。

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