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青岛海绵出售,供货有保障

价格:面议 2024-11-26 02:00:01 7632次浏览

海绵”之名由此而来。我没有嘴,没有消化腔,也没有系统,是一个原始的动物。布满全身的小孔内长着许多鞭毛和一个筛子状的环状物,可用鞭的摆动收进海水,海水带进氧气、、微小藻类和其它有机碎屑,再经环状物过滤,后变为海绵维计生存的养料。

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