A
|
|
Surface area(sq mi)
|
Volume(cu mi)
|
Percentage of total
|
|
Salt water
|
|
The oceans
|
139,500,000
|
317,000,000
|
97. 2％
|
|
Inland seas and saline lakes
|
270,000
|
25,000
|
0. 008
|
|
Fresh water
|
|
Freshwater lakes
|
330,000
|
30,000
|
0. 009
|
|
All rivers(average level)
|
－
|
300
|
0. 0001
|
|
Antarctic Icecap
|
6,000,000
|
6,300,000
|
1. 9
|
|
Arctic Icecap and glaciers
|
900,000
|
680,000
|
0. 21
|
|
Water in the atmosphere
|
197,000,000
|
3,100
|
0. 001
|
|
Ground water within half a mile from surface
|
－
|
1,000,000
|
0. 31
|
|
Deep-lying ground water
|
－
|
1,000,000
|
0. 31
|
|
Total (rounded)
|
－
|
326,000,000
|
100. 00
|
The Antarctic Icecap is the largest supply of fresh water，representing nearly 2% of the world’s total of fresh and salt water. As can be seen from the table above, the amount of water in our atmosphere is over 10 times as much as the water in all the rivers taken together. The fresh water actually available for human use in lakes and rivers and the accessible ground water amount to only about one-third of 1% of the world’s total water supply.
21. Which two places share equal amount of fresh water?
A. Freshwater lakes and all rivers (average level)
B. Antarctic Icecap and water in the atmosphere
C. Deep-lying ground water and Arctic Icecap and glaciers
D. Ground water within half a mile from surface and Deep-lying ground water
22. The fresh water that humans can use is ________.
A. about 1,086,700 cu mi B. about 6,300,000 cu mi
C. about 680,000 cu mi D. about 2,000,000 cu mi
23. What’s the best title of this passage?
A. Fresh Water in the World B. Water Supply of the World
C. Salt Water of the Earth D. Protection of the Water in the World
【答案】21. D 22. A 23. B
【解析】
这是一篇说明文。本文说明了世界水资源的分布情况，以及淡水和海水的具体的百分比情况，并详细说明了各种水资源所占的比例等数据。
【21题详解】
细节理解题。对比表格倒数2、3行中Ground water within half a mile from surface和Deep-lying ground water.的Fresh water部分可知，这两者淡水水量基本相同。故选D。
【22题详解】
细节理解题。根据第一段中The fresh water actually available for human use in lakes and rivers and the accessible ground water amount to only about one-third of 1% of the world’s total water supply.可知实际上，湖泊和河流中可供人类使用的淡水和可获得的地下水仅占世界总供水的三分之一。由此可知，全世界水含量是326,000,000，可以饮用的淡水大约有1,086,700 cu mi。故选A。
【23题详解】
主旨大意题。根据本文说明了世界水资源的分布情况，以及淡水和海水的具体的百分比情况，并详细说明了各种水资源所占的比例等数据。故B选项“世界的水供应”最符合文章标题。故选B。
