三、信息还原
KEY→P13
范畴:人与社会 主题:科学研究 体裁:说明文 难度:★★★ 建议用时:6分钟 评价:/5
请认真阅读下面短文,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Over 70 per cent of the earth's surface is covered by water, but most of it has a high salt content. That means most of that water is undrinkable. Our bodies need both water and salt.
1.
The problem with sea water is the amount of salt in it. 2. When we take in too much salt, our bodies will get rid of the extra salt through our urine(尿).
3. This means there are nine grams(克) of salt in every 1,000 grams of human blood. Sea water has far more salt than human blood. It has the salinity of 3.5%.
Drinking sea water causes your body to get rid of the extra salt by urinating. It makes your body lose a lot of water. 4.
5. It means that if you keep drinking sea water instead of fresh water, you might face organ(器官) failure or even die.
A. And you may feel even thirstier.
B. Our bodies only need a little salt.
C. So why don't we drink sea water?
D. People need a lot of salt every day.
E. Human blood has the salinity of 0.9%.
F. Try to eat healthily and drink more water.
G. When you drink sea water, there'll be a problem with part of your body.

信息还原 1~5 C B E A G
地球上大部分地方被海水覆盖，但人们却不能饮用海水，因为海水的盐分太高。
1. C 2. B 3. E 4. A 5. G