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单选题
The phrase “a ticking time bomb” in the second paragraph is used to stress _____
A
the risk of sleep deprivation.
B
our concern about good health.
C
one possible cause of early death.
D
our ignorance about the lack of sleep.
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参考解析
解析：
文章第二段中由who引出的定语从句解释了为什么将 The trend for late nights and early mornings比喻为“a ticking time bomb”，该定语从句指出lack of sleep会引起各种身体不适，并会导致early death，可见，该比喻是为强调睡眠不足带来的严重后果，故应选A。
文章第二段中由who引出的定语从句解释了为什么将 The trend for late nights and early mornings比喻为“a ticking time bomb”，该定语从句指出lack of sleep会引起各种身体不适，并会导致early death，可见，该比喻是为强调睡眠不足带来的严重后果，故应选A。
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