2. 外语
  3. Medical students learn to distinguish "acute," which means something of recent onset, from "chronic," which means a condition th

Medical students learn to distinguish "acute," which means something of recent onset, from "chronic," which means a condition th

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问题 Medical students learn to distinguish "acute," which means something of recent onset, from "chronic," which means a condition that will probably continue for a______ period of time.
选项 A、gloomy
B、temporary
C、tough
D、substantial
答案D
解析 D选项：substantial的意思为“大量的，可观的”，如：The country bought asubstantial number of weapons．(这个国家购买了太量武器。)句意：医科学生应学会区分“急性”和“慢性”。“急性”是指最近突发的病症，“慢性”是指某种可能会持续很长时间的病症。故选D。其他三项意思分别是：gloomy阴暗的，令人沮丧的；temporary暂时的，短暂的；tough坚强的，粗暴的。
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