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by 陈敏

ebook

1 of 1 copy available

1 of 1 copy available

为什么发芽的土豆有毒,为什么落叶着地时叶背向上,为什么有的植物会胎生,还魂草为什么"还魂",何首乌为什么象人形,葵花为什么向太阳,为什么植物的种子是大力士,跳豆为什么会跳动......