2. 外语
  3. A.Kripike’s research tool. B.Dangers of habitual shortages of sleep. C.Criticism on Kripke’s report. D.A way of overcoming insom

A.Kripike’s research tool. B.Dangers of habitual shortages of sleep. C.Criticism on Kripke’s report. D.A way of overcoming insom

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问题 A.Kripike’s research tool.
B.Dangers of habitual shortages of sleep.
C.Criticism on Kripke’s report.
D.A way of overcoming insomnia.
E.Sleep problems of long and short sleepers.
F.Classification of sleep problems.
*
选项
答案B
解析 段落的结构Previous studies have shown the potential dangers of chronic shortages of sleep — for instance...表明了该段的中心是讲述“长期睡眠不足的潜在危险”。
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