题文
C
An oasis (绿洲) is an island of life in an ocean of temperature extremes．Any oasis always contains one or more springs Oases make it possible to survive through the desert．In large deserts such as the Sahara．towns are located around sources of water such as oases and rivers．
What causes an oasis? An oasis is actually a spot in the desert where the altitude is low enough that the water table is fight below the surface，resulting in the presence of springs．Even in a desert, it rains occasionally，and this produces a water table just above the bedrock，usually several hundred feet below the surface．Sand is very porous (可渗透的)，so most water runs right
through it and down to the bedrock．
Deserts consist of many millions of tons of sand．There is only one natural force capable of moving it in noticeable amounts：the wind．Although，in an average dust storm，ten cubic feet of air only holds about an ounce of sand，a cubic mile of air can move about 4,600 tons of it，leading to erosion (侵蚀)．A severe storm is capable of moving as much as 100 million tons of sand and dust．
In certain areas where large quantities of sand are moved by storms，erosion digs all the way down to the water table，putting it just beneath the surface Seeds planted in the ground there are capable of extending roots into the moist land，producing an oasis．
Sometimes．the oasis produced by the wind can be very large when vast tracts of desert are wiped clean by storms．The great Kharga oasis in the Sahara，for example，is over 100 miles long and 12 to 50 miles in width. The oasis was produced when erosion caused the edges of the hollow places to sink down to the water table.
63．What does “it” in Paragraph 4 refer to_______．
A．erosion B．water table C．sand D．storm
64．How many conditions of the oasis formation are mentioned in the passage without considering
The wind and seeds?
A．3 B．4 C．5 D．6
65．We can infer from the passage ________．
A．there is at least one spring on an oasis
B．the bedrock is usually just right below the surface
C．the great Kharga oasis is the biggest oasis in the world
D．the great Kharga oasis is at a low altitude
66．In the last paragraph，the author mentions the great Kharga oasis as an example to_______．
A．introduce the great oasis to the readers
B．tell how the oasis was produced by rain
C．show the oasis produced by the wind can be very large
D．tell it’s easy to form oases in the desert after storms 题型：未知 难度：其他题型
答案
63---66 BADC
解析
略考点
据考高分专家说，试题“C An oasis (绿洲) is a.....”主要考查你对 [政治经济类阅读 ]考点的理解。政治经济类阅读
政治经济类文章的概念：
要做好这类阅读，平时就要注意了解国内外发生的政治经济大事，掌握一定背景知识，对这类文章的叙述特点及内容安排有一定了解，还要扩展这方面的词汇。阅读这类文章，要抓住文章的核心，即文章整体和各段主要在说什么，也要注意段落之间的逻辑关系。
如何备考政治经济类阅读理解题：
【题型说明】政治经济类阅读文章是高考常选材料之一。该类文章时代气息浓郁，语言鲜活，但熟字新义词、超纲词及专业词语多，长句、难句多。政治类文章大多数是同学们感性趣的内容，读起来倒有似曾相识的感觉，经济类文章读起来就像是雾里看花，文章看完，一头雾水。再加之这类文章的命题侧重于词义猜测、推理判断和文章主旨，同学们对这类题材是望而生畏。
【备考策略】建立心理优势。针对不同体裁的文章，我们要采取相应的阅读方法和技巧。政治类文章多采用记叙文形式，我们可采取“顺读法”，以便抓关键语句，领会文章主旨；而经济类文章则多采用说明文形式，我们则可以采取“逆读法”，先读试题，再从文章中查找有用信息。若遇到的确难读的材料。千万不用着急，因为你觉得难，其他人也一定是同感。在高考前，我们就要有这种心理准备，高考试卷肯定有一、两篇难以阅读的材料。不过，我们平时可以有意识地从报刊杂志上找一些较难的阅读材料来阅读，以培养自己迎难而上的心理素质。
【答题方法】
1、寻找主干：
根据英语中五种基本句型结构，把句子中的主语、谓语、宾语、表语等主要成分找出来，其他成分如定语、状语、补语等则易于理解。找到了句子主干，句子的意思至少明白了一半。
2、剔除从句：
在一个长句中可能会出现若干个从句，在理解时，如果把各个从句剔除出来单独理解，然后把大意拼凑起来，整个长句的意思就会明白六、七分。
3、辨别分句：
一个长句如果是由几个并列、转折、递进、对比关系的分句组成，句中往往有表示这些分句关系的连接词，只要能弄清楚分句和分句之间的逻辑关系，再把各层分句的意思加以连贯，整个长句的句意基本上能跃然脑中。
4、寻找关键词：
如果一个句子看完，一点句意的感觉也没有，下下策就是抓住句中的关键词，通过关键词大体弄懂这个长句的意思。
