I went to bed at 8 o’clock in the evening, wound up my clock and set the alarm t

游客2024-08-12  11

问题 I went to bed at 8 o’clock in the evening, wound up my clock and set the alarm to sound at 9 o’clock in the morning. How many hours’ sleep would I get before being awoken by the alarm?

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答案 1 hour

解析 (这里认为clock是上发条的老式闹钟,无法区分9点和21点。)
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