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  3. Water is necessary for life and good health. We often forget this fact when we think about the other building blocks of life suc

Water is necessary for life and good health. We often forget this fact when we think about the other building blocks of life suc

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问题     Water is necessary for life and good health. We often forget this fact when we think about the other building blocks of life such as vitamins, minerals and proteins. We can live for many days without eating, but two or three days without water usually leads to death.
    The human body may look solid, but most of it is water. Newborn babies are as much as 85% water. Women are about 65% water and men about 75% . Women usually have less water than men because women, in general, have more fat cells, and fat cells hold less water than other kinds of cells.
    Water is necessary for cooling the body under hot weather and when we are working hard or exercising, water carries body heat to the surface of the skin, where the heat is lost through perspiration.
    Researchers note that fat cells block body heat from escaping quickly. Fat cells under the skin act like warm clothing to keep body heat inside. This is why overweight people have a more easy time staying cool than thin people.
    Researchers also note that cool liquids cool us faster than warm liquids, because cold liquids take up more heat inside the body and carry it away faster. They say, however, that cold sweet drinks do not work well because the sugar slows the liquid from getting into the blood stream.
    The body loses water every day through perspiration and urine. If we lose too much, we will become sick. To replace what is lost, health experts say grown persons should drink about 2 liters of liquids each day, and more in hot weather. They say we can also get some of the water we need in the foods we eat. Most fruits and vegetables are more than 80% water. And even bread is about 33% water.
From the passage we learn that among the following four groups of people______.
选项 A、fat women are over eighty percent water
B、thin men are never eighty percent water
C、newborn infants are over eighty percent water
D、elderly adults are over eighty percent water
答案C
解析 事实细节题。本题提问的是关于下列四类人群，我们可以从文中知道什么。根据文章第二段，特别是“Newborn babies are as much as 85％water．”可知选项C为正确答案。
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