2. 外语
  3. The science of astronomy was begun by amateurs and today remains dependent on their contributions, which are incisive by virtue

The science of astronomy was begun by amateurs and today remains dependent on their contributions, which are incisive by virtue

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问题 The science of astronomy was begun by amateurs and today remains dependent on their contributions, which are incisive by virtue of being ______ by the a priori assumptions that often vitiate the work of professional research scientists.
选项 A、characterized
B、unencumbered
C、supported
D、contradicted
E、inspired
答案B
解析 方程等号：by virtue of=because of，因为，同义重复。强词和对应：天文学是由业余爱好者开启的，而且今天它依旧依赖这些人的贡献，这些贡献是深刻的因为它们被想当然的假设所空格，这些假设削弱了专业科学家的成果。本题的方程等号是by virtue of因为，前后同方向，前面说“业余爱好者的贡献是深刻的”而后面说“想当然的假设会削弱专业科学家的成果”，所以空格应填入一个负向词。characterized以…为特征，unencumbered不受束缚，supported被支持，contradicted被反对，inspired被激励。答案选B。
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