問題詳情

請依下文回答第42 題至第45 題 With the increasing water shortages and growing water conflicts, some people start to ask: why don’t we get ourdrinking water from the ocean? The problem is that the desalination of water requires a lot of energy. Salt dissolves veryeasily in water, forming strong chemical bonds, and those bonds are difficult to break. Energy and the technology todesalinate water are both expensive.There are environmental costs of desalination as well. Sea life can get sucked into desalination plants, killing smallocean creatures, and upsetting the food chain. Also, there’s the problem of what to do with the separated salt. Pumpingthis super-salty water back into the ocean can harm local aquatic life. Reducing these impacts is possible, but it adds tothe costs.Despite the economic and environmental hurdles, desalination is becoming increasingly attractive as we run out ofwater from other sources. We are over-pumping groundwater, we have already built more dams than we can affordeconomically and environmentally, and we have tapped nearly all of the accessible rivers.Far more must be done to use our existing water more efficiently, but with the world’s population escalating and thewater supply dwindling, the economic tide may soon turn in favor of desalination.
42 Which of the following is NOT mentioned in the passage as a reason why we don’t desalinate water from theocean?
(A) Marine ecology might be disrupted.
(B) Desalinating seawater is rather costly.
(C) Land for desalination plants can’t be easily acquired.
(D) The chemical bonds in saltwater are difficult to break.

參考答案

答案：C
難度：適中0.44
統計：A(21),B(9),C(33),D(8),E(0)

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