阅读理解. A nearly ice

题文

阅读理解.

A nearly ice-free Arctic Ocean inthe summer may happen three timessooner than scientistshave assd.New rearch says the Arctic might lomost of its ice cover in summer in as few as 30 years insteadof by the end of the century. The amount of the Arctic Ocean covered by ice at theend of summer by then could be only about 1 million squarekilometers. That's compared to today's ice extent c范围)of4. 6 million square kilometers. So much more open watercould be an advantage for shipping and for extracting(开采)minerals and oil from the abed, but it rais the questionof ecosystem change. While the Intergovernmental Panel on Climate Change in 2007 assd what might happen in the Arctic in the future bad on results from more than a dozen globalclimatemodels, two rearchers said that the dram4tic dropsin the extent of ice at the end of summer in 2007 and 2008called for a different approach.  Out of the 23 models now available, the newpredictions are bad on the six most suited for asssing a ice, according to Muyin Wang, a climate scientist in a universityof Washington, and James Overland, an oceanographer. Wang and Overland soughtmodels that best matched what has actually happened in recent years,becau, "if amodel can't do today's conditions well, howcan you trust its future predictions?" Wang says. " In recent years the combination of unusual warmtemperatures from natural caus and the global warmingsignal have worked together to provide an earlier summera-iceloss than was predicted when scientists consideredthe effects from human-caud

carbon dioxide alone," saysOverland. Scientists don't expect the Arctic to be totally ice free,figuring that ice still will befound along northern Canadaand Greenland where powerful winds sweeping across theArctic Ocean force ice layers to slide on top of each other,making for a very thickice cover.

1. The main idea of this passage is supported by . A. the theory that has been provedB. opinions from government officials C. examples that were provided by the author D. rearchers' asssment of the global climate models 2. Which statement do the rearchers em to agree with? A. That the ice in the Arctic Ocean will disappearcompletely in 30 years.B. That there will be a very thick ice cover in northern Canada. C. That the a-ice loss was the effect of the unusual climate change.D. That the temperature will be very low in the futurebecau of the a ice.3. How many models was the new prediction made by Muyin Wang and James Overland bad on? A. 3B. 6C. 12 D. 23 4. The author writes this passage to tell readers_.A. how to prevent global warmingB. the cau of global warmingC. the new rearch about the Arctic a-iceD. how to do rearch with models . 题型：未知难度：其他题型

答案

1-4DBBC

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据考高分专家说，试题“阅读理解. A .....”主要考查你对 [健康环保类阅读 ]考点的理解。 健康环保类阅读

健康环保累阅读概念：

健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。

健康环保类文章阅读技巧：

   健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：   第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；   第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；   第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。   从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。【阅读策略】 1、概要(Summarizing)：  阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。 2、组织(Organization)：  阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。