2. 外语
  3. Under ethical guidelines recently adopted by the National Institutes of Health, human genes are to be manipulated only to correc

Under ethical guidelines recently adopted by the National Institutes of Health, human genes are to be manipulated only to correc

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问题 Under ethical guidelines recently adopted by the National Institutes of Health, human genes are to be manipulated only to correct diseases for which ________ treatments are unsatisfactory.
选项 A、similar
B、most
C、dangerous
D、uncommon
E、alternative
答案E
解析 - 方程等号：which引导的定语从句修饰diseases，同义重复。
- 强词和对应：前文说最近研究的人类基因是可以治病的。unsatisfactory和correct取反，human genes和treatments描述不同的治疗方法，因此空格体现两者取反。similar相似的，most大多数的，dangerous危险的，uncommon不同寻常的，alternative其他的。 答案选E。
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