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

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

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问题 Under ethical guideline recently adopted by the National Institutes of Health, human genes are to be manipulated only to correct disease for which______treatments are unsatisfactory.
选项 A、similar
B、dangerous
C、uncommon
D、alternative
答案D
解析 本题考查形容词辨析。A相似的；B危险的；C不寻常的，罕有的；D供选择的，选择性的，交替的。句意为：根据国家健康研究机构最近通过的基于伦理学的指导方针，人类的基因只有在(其他的)治疗方案无法令人满意的情况下才可以改变。D为正确选项。
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