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因为小孩有生长激素，大人没有，而且大人的软骨由于性激素的作用而钙化，不再生出新骨。所以大人如注射生长激素，只会得枝端肥大症，而不会长高。
pyramid
(金字塔)
(#191585@0)
Last Updated: 2001-9-6
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替我4岁小儿请教个问题：为什么小孩吃饭能长大，大人吃饭不再长大了呢？
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