問題詳情
49 至 52 題為題組Most parts of Taiwan have access to sufficient supplies of fresh water for drinking. But fresh water canbe in short supply in many arid regions of the world such as Saudi Arabia, where there are limited waterresources. As the world population continues to grow, shortages of fresh water will occur more often andthe need for additional water supplies will become critical. Some may ask, “Since the ocean covers morethan 70 percent of the Earth, why not just get drinking water from the ocean?”To turn seawater into fresh water, we need to remove the salt in seawater, that is, to desalinate seawater.The problem is that the desalination of water requires a lot of energy. Salt dissolves very easily in water,forming strong chemical bonds, and those bonds are difficult to break. The energy and technology todesalinate water are both expensive, and this means that desalinating water can be costly.There are environmental costs of desalination as well. Sea life can get sucked into desalination plants,killing small ocean creatures like baby fish and plankton, upsetting the food chain. Also, there is theproblem of what to do with the separated salt, which is left over as a very concentrated brine. Pumping thissuper-salty water back into the ocean can harm local aquatic life. Reducing these impacts is possible, but itadds to the costs.Despite the economic and environmental hurdles, desalination is becoming increasingly attractive ashuman beings are using up fresh water from other sources. At present, desalinating seawater is the onlyviable way to provide water to growing populations in rural areas of the Middle East and North Africa.Therefore, the race is on to find a cheaper, cleaner, and more energy-efficient way of desalinating seawater,and promising new findings are being reported.
【題組】49. Which of the following is closest in meaning to “arid” in the first paragraph?
(A) Occupied.
(B) Isolated.
(C) Dry.
(D) Remote.
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
用户評論
【神山日光Ninko】評論
Most parts of Taiwan have access 使用to sufficient 足夠supplies of fresh water純水 for drinking. But fresh water can be in short supply in many arid乾旱/乾燥 regions 地區of the world such as Saudi Arabia, 沙烏地阿拉伯where there are limited water resources. 限制水資源As the world population continues to grow, shortages of fresh water 純水的短缺will occur 發生/出現more often and the need for additional water supplies will become critical. Some may ask, “Since the ocean covers more than 70 percent of the Earth, why not just get drinking water from the ocean?” To turn seawater into fresh water,...
【方蔥香】評論
台灣大部分地區都有足夠的淡水供人飲用。但在世界上許多乾旱地區，如沙特阿拉伯，淡水資源供應有限，淡水可能供不應求。隨著世界人口的持續增長，淡水的短缺將更頻繁地發生，並且需要額外的供水將變得至關重要。有人可能會問，“既然海洋佔地球的70％以上，為什麼不從海洋中獲取飲用水呢？” 為了將海水變成淡水，我們需要去除海水中的鹽，即淡化海水。問題是水的淡化需要大量的能量。鹽很容易在水中溶解，形成強烈的化學鍵，這些鍵很難破碎。淡化水的能量和技術都很昂貴，這意味著淡化水可能是昂貴的。海水淡化也有環境成本。海洋生物可以被吸入海水淡化植物，殺死小型海洋生物，如幼魚和浮游生物，擾亂食物鏈。此外，存在如何處理分離的鹽的問...