李白诗云：“君不见，高堂明镜悲白发，朝如青丝暮成雪”。从细胞

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A．酶的活性降低 B．细胞内水分减少

C．细胞核体积缩小 D．细胞内呼吸速率减慢

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李白诗云：“君不见，高堂明镜悲白发，朝如青丝暮成雪”。从细胞

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