2. 外语
  3. Heart attacks can be treated with human cloning technology by ______. Cancer may be cured with the cloning technology by ______

Heart attacks can be treated with human cloning technology by ______. Cancer may be cured with the cloning technology by ______

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问题 Heart attacks can be treated with human cloning technology by ______.
Cancer may be cured with the cloning technology by ______.
选项 A、attacking the diseased cells with healthy ones
B、controlling the growth of the cells
C、detecting disordered genes in the cancer cells
D、activating cancer cells by switching them on
答案B
解析 本题为细节题。从第四段"We may learn how to switch cells on and off through cloning and thus be able to cure cancer．”这句中可得到答案。
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