题目内容：
Why may the repair process of the DNA finally fail?
参考答案：
答案解析：
单选题：Why may the repair process of the DNA finally fail?
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课外阅读是提高语文水平的重要途径，可以使我们获得很多有益的启示，充实我们的生活。读《三国演义》，我们可以领略到诸葛亮舌战群儒的风采；读《钢铁是怎样炼成的》，我们
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Radiation exposure should be
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But in the end he approved of our proposal.
But in the end he approved of our proposal.
And the cars are tested for defects before leaving the facto
And the cars are tested for defects before leaving the factory.