题目内容

轮虫的咀嚼囊内有咀嚼器，有强大的肌肉，可灵活运动，起咀嚼和消化作用。

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Ancient Greek and ______ philosophy is the cornerstone of western philosophy.

绿藻门接合藻纲和绿藻纲的主要区别是营养细胞或生殖细胞不具鞭毛，不能运动，有性生殖为接合生殖。

The Axial age refers to a period from the 6th to the 3rd centuries B. C. in which a lot of distinguished philosophers in the East and West lived and spread their ideas.

隐藻形态为单细胞,背面隆起，腹面平直或凹入，整个细胞左右不对称，无细胞壁，细胞裸露或仅具表质，柔软或坚固。