The Antarctic Icecap is the largest supply of fresh water.representing nearly 2%
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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 below, 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.
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 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 |
56. What’s the best title of this passage?
A. Fresh Water in the World B. Protection of the Water in the World
C. Salt Water of the Earth D. Water Supply of the World
57. It can be seen from the table______.
A. humans will have to use sea water in the future
B. there is enough fresh water for man to use
C. Water in the atmosphere is the least
D. the sea water takes up 98％of the water on earth
58. 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
59. Where does the majority of fresh water exists?
A. In Arctic Icecap and glaciers. B. In the Antarctic Icecap.
C. In Deep ground. D. In the atmosphere.
60. What are the two places where equal amount of fresh water is stored?
A. Freshwater lakes and all rivers(average level)
B. Antarctic Icecap and water in the atmosphere
C. Ground water within half a mile from surface and Deep-lying ground water.
D. Deep-lying ground water and Arctic Icecap and glaciers
试题答案
DDABC