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Water is necessary for life and good health. We often forget this fact when we think a-bout the other building blocks of life su
Water is necessary for life and good health. We often forget this fact when we think a-bout the other building blocks of life su
admin
2013-12-08
42
问题
Water is necessary for life and good health. We often forget this fact when we think a-bout 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.
What should we do to keep enough water in the body?
选项
A、To take two liters of water daily all through the year.
B、To eat everything that contains water.
C、To take in as much as we have lost.
D、To drink only when we feel very thirsty.
答案
C
解析
本题为细节推理题,提问的是我们应该如何来保持身体内有充足的水分。根据文章最后一段,作者认为人们损失的水分应该尽快再摄取回来。所以答案为C),即将每天通过排泄和排汗丢失的水分再补充回来。
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0
成人本科学位英语
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