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turn to look for deal with talk about
正常的细胞会随着分裂次数的增加而衰老 细胞分化是有关基因发生改变造成的 低温引起的细胞冻伤和死亡属于细胞坏死 受遗传机制决定的细胞程序性死亡属于细胞凋亡
thus then after all if not
has fallen had fallen is falling was falling
A. sound sounded sounding sounds
细胞2、细胞3均起源于造血干细胞 仅细胞4中宙有合成物质a的基因 ②、③过程与细胞膜上蛋白质有关 细胞5属于保留分裂能力的细胞
looking up looking out looking into looking for
丙酮酸氧化分解 突触小泡与细胞膜融合 突触前膜释放神经递质 完成“化学信号→电信号”的转变
will you don’t you are you didn’t you