2. 外语
  3. While scientists dismiss as fanciful the idea of sudden changes in a genetic code (spontaneous mutation), it is possible that na

While scientists dismiss as fanciful the idea of sudden changes in a genetic code (spontaneous mutation), it is possible that na

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问题 While scientists dismiss as fanciful the idea of sudden changes in a genetic code (spontaneous mutation), it is possible that nature, like some master musician, _____ on occasion, departing from the expected or predictable.
选项 A、repeats
B、improvises
C、ornaments
D、corrects
E、harmonizes
答案B
解析 - 方程等号：逗号，前后同义重复。
- 强词和对应：逗号前后取同，逗号后面说和那些我们期待和预测的事物相背离，所以空格应该体现“与常规相反”或者“无法预测”。repeat复述，improvise即兴演出，ornament装饰，correct更正，harmonize和谐。improvise的释义是to speak or perform without preparation。答案选B。
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