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Gaokao Biology Practice Question

关于癌症, 下列叙述错误的是

  1. A.成纤维细胞癌变后变成球形, 其结构和功能会发生相应改变
  2. B.癌症发生的频率不是很高, 大多数癌症的发生是多个基因突变的累积效应
  3. C.正常细胞生长和分裂失控变成癌细胞, 原因是抑癌基因突变成原癌基因
  4. D.乐观向上的心态、良好的生活习惯, 可降低癌症发生的可能性

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