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  3. After a day’ s hard work, we need some sleep. During the sleep, the fatigue of the body disappears and recuperation (恢复) begi

After a day’ s hard work, we need some sleep. During the sleep, the fatigue of the body disappears and recuperation (恢复) begi

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问题    After a day’ s hard work, we need some sleep. During the sleep, the fatigue of the body    disappears and recuperation (恢复) begins. The tired mind gathers new energy, and the memory    improves.
   Some adults require little sleep: others need eight to ten hours in every twenty-four hours.    Infants sleep sixteen to eighteen hours daily, the amount gradually diminishing as they grow older.    Young students may need twelve hours: university students may need ten. A worker with a    physically demanding job may also need ten, whereas an executive working under great pressure may manage on six to eight. Many famous people have little sleep. Napoleon Bonaparte, Thomas Edison and Charles Darwin apparently averaged only four to six hours a night.
   Whatever your individual need is, you can be sure that by the age of thirty you will have slept for a total of more than twelve years. By that age you will also have developed a sleep routine: a favorite hour, a favorite bed, a favorite position, and a rule you need to follow in order to rest comfortably.
   Investigators have tried to find out how long a person can go without sleep. Several people have reached more than 115 hours—nearly five days. Whatever the limit, it is absolute. Animals that kept awake for from five to eight days have died of exhaustion. The limit for human beings is probably about a week.
By writing this passage, the writer intends to tell us that______.
选项 A、sleep is important for good health
B、a light sleep is as restful as a deep sleep
C、memory is improved during sleep
D、sleep is relatively unimportant for human beings
答案A
解析 根据第一段“…we need some sleep．During the sleep，the fatigue of the body disappears and recuperation begins．The tired mind gathers new energy，and the memory improves．”可知，一天的辛苦工作之后，我们需要一些睡眠。人在睡 觉时身体的疲劳会消失，体能开始恢复。劳累的思维开始积攒新的能量，记忆力 开始提高。由此可推知，睡觉可以促进脑力和体力的恢复，对健康非常重要。故 选A。
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