单选题
英语四级
2010-05-24
It can be inferred from the passage that __________.
A．there will be a shortage of water but sufficient supply of food in the future
B．there have been different opinions of future water sources
C．icebergs can be used extremely efficiently
D．the earth has 10,000 polar ice caps
参考答案
B
答案解析
【设题分析】
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A．Pulling icebergs to dry area is economically possibl
B．Desalination of water is the best way to obtain drinking wate
C．Using water from icebergs is a very short-term solution to water shortage
D．Icebergs could not be hauled very far before they would mel
