单细胞个体都很微小，跟人类没有任何关系。-七年级生物

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• 下图是某同学在显微镜下观察到的草履虫图像，则草履虫在临时装片上的状态是-七年级生物
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• 使用显微镜观察草履虫时，经常在临时装片的培养液中放一些棉丝，其作用是（）A．限制草履虫运动B．增加营养C．便于计数D．增加温度-七年级生物
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