单项选择题

Of all the reserves of fresh water in the world, about three-fourths is ______.

A．consumed by glaciers and polar ice
B．in solid form
C．out of the reach of present technology
D．converted into sea water annually
<上一题 目录 下一题>
热门 试题

单项选择题
The word precipitation (Line 6, Para. 2) probably means ______.
A．the evaporation of water from the land
B．the water reserves on land
C．the unevenly-distributed rain and snow falls
D．water falling in the form of rain and snow
单项选择题
The end of the passage implies that the water finally available for mankind to utilize each year ______.
A．is enough to meet all human needs
B．is a little more than enough for all human needs
C．is not adequate for all human needs
D．is adequate now but will not be enough for some years to come
相关试题