下列说法中正确的是 A.脊髓和西瓜瓤都属于组织b.草履虫体内多余的水分和废物由胞肛排出体外c.病毒没有细胞结构只能寄生在活细胞里对人类 Template




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tomski下列说法中正确的是 a.脊髓和西瓜瓤都属于组织b.草履虫体内多余的水分和废物由胞肛排出体外c.病毒没有细胞结构只能寄生在活细胞里对人类 coloring