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

After a day’ s hard work, we need some sleep. During the sleep, the fatigue (疲劳) 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 (疲劳) 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(婴儿) 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, 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.
The author implies that if human beings are kept awake for more than a week the result______.
选项 A、is hard to imagine
B、will probably be a mental breakdown
C、is difficult to describe
D、will probably be dead
答案D
解析 题干意为“从文章可以看出，如果一个人保持一周以上不睡觉，结果会…”。由文章最后一句可以看出，人类不睡觉的极限大约是一周，因此一周以上不睡觉就很可能会因筋疲力尽而死亡。故选D。
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