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  3. How Long Can a Human Survive Without Water and Food? People do not need food as much as they do water. In fact, they can sur

How Long Can a Human Survive Without Water and Food? People do not need food as much as they do water. In fact, they can sur

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问题             How Long Can a Human Survive Without Water and Food?
    People do not need food as much as they do water. In fact, they can survive quite a long time without it depending on many factors. 【T1】______Indian leader Gandhi once fasted(禁食; 戒斋)for three weeks. According to medical experts people can survive without food for up to two months, as long as they have enough to drink. If you are strong and in good physical shape you are likely to survive longer, because the body stores fat, carbohydrates and other forms of energy. 【T2】______
    Surviving without food also depends on how fast a person burns food. Those who use up food energy faster will probably not survive as long as those who burn food more slowly. Climate also plays an important role in survival. 【T3】______A hot climate allows you to go on longer without replacing food.
    Eating too little for a long time causes your body to react in some special ways. 【T4】______After many weeks without food your body organs can fail one after the other.
    【T5】______We constantly lose water through sweat, urine, breathing and other activities. If it is very hot your body can dehydrate within a matter of hours. The water and minerals the body loses must be replaced so that our organs can work as they should. Water helps us cool down in the heat; otherwise we would suffer from a heat stroke. Doctors also tell us to drink a lot when we are ill and have fever.
    Dehydration can lead to many illnesses, from too little urine to a dry mouth, a fast heartbeat or even vomiting. Shock comes at the end of dehydration. The body becomes cool and blood pressure goes down rapidly.
    Doctors recommend drinking one to three liters of water a day, depending on the climate and how much you sweat or exercise. You should never go on without water for a day or more.
A. Living without water is a very different story.
B. Water is primary condition of the human survival and lifeline of the national economy.
C. Cold weather makes you use up more energy.
D. It may lead to physical weakness or confusion.
E. History has shown that people can go on for weeks without eating anything.
F. That is why fatter people can survive longer.
【T4】
选项
答案D
解析 空格前“Eating too little for a long time causes your body to react in some special ways．(很长一段时间吃得太少，会使你的身体出现特殊的反应)”；以及空格后“After many weekswithout food your body organs can fail one after the other．(经过几个星期没有食物后，你的身体器官可能会接二连三地衰退)”，两者联系，选项D最符合逻辑。
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