公共英语五级阅读文章《从冰山获取淡水资源》

　　我们知道人类的生存发展离不开淡水资源，但是淡水资源是有限的，现在有人提议可以从冰山中得到淡水资源，你认为呢?下面，我们一起来看这篇公共英语五级阅读文章。

　　Obtaining Fresh Water from Icebergs

　　The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.

　　Glaciers are a possible source of fresh water that has been overlooked until recently. Three-quarters of the Earth's fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. Floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10,000 icebergs that break away from the polar ice caps, more than ninety percent of them from Antarctica.

　　Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. Icebergs are not like sea ice, which is formed when the sea itself freezes, rather, they are formed entirely on land, breaking off when glaciers spread over the sea. As they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. Because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean. To corral them and steer them to parts of the world where they are needed would not be too difficult.

　　The difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. But even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalinization, or removing salt from water.

　　附：公共英语五级的阅读技巧

　　(1)回答有关文章细节的问题时可采取查读法。在查读的同时，要默默地重复所寻找的细节。这种重复可加强视觉感知效果，更快捷、有效地找到所寻求的信息。

　　(2)回答推断性问题时考生应依据文章所讲的内容，利用推理的方法做出合理的选择。这类问题难就难在考生无法直接从文章中找出考题的答案，而必须在完全理解文章的基础上，悟出其中隐含的意思。

　　回答这类问题时，往往需要利用常识、经验及文章中的观点和内容进行逻辑推理。关联词、带有感情色彩的形容词或副词常常是一些有助于考生进行推理的语境线索。

　　(3)目的.问题与主题问题关系密切。但应试时，回答目的类问题的难度更大一些。原因在于考生必须选取一个通常在文章中找不到的答案。

　　作者的写作目的多种多样，常见的有提供信息、描述事件、陈述问题、讲述故事、进行规劝等。

　　(4)语气问题所指的语气是指作者在文章中直接表达的或者暗中流露出来的，对文章涉及的对象所持的态度和倾向性意见。无论是直接表达还是间接流露，作者不是运用带有感情色彩的词汇或褒贬强烈的语句，就是依靠直接在文中插入作者的评语，甚至是一些讥讽嘲弄的口吻，来取得传达语气的预期效果。回答这类问题，关键在于掌握一些语气词。

【公共英语五级阅读文章《从冰山获取淡水资源》】相关文章：

2017公共英语二级阅读文章《冰山》06-21

公共英语五级阅读文章《火力发电厂》公共英语五级阅读文章《统计学》