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  3. 共用题干 第三篇The SaharaThe name Sahara deriv

共用题干 第三篇The SaharaThe name Sahara deriv

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问题 共用题干第三篇

The Sahara

The name Sahara derives from the Arabic word for"desert"or"steppe".At 3.5 million square miles,
an area roughly the size of the United States,the Sahara Desert in northern Africa is the largest desert in the
world.It spans the continent from the Atlantic Ocean to the Red Sea.Daytime temperatures can reach as high
as 130°F.The humidity sometimes gets into the teens.But it can also be as low as 2.5 percent,the lowest in
the world.Most of the Sahara receives less than five inches of rain per year,while large areas sometimes have
no rainfall at all for years.
At the heart of the Sahara is the landlocked north African country of Niger. Here the sand dunes can be
100 feet tall and several miles long.Here sand plains stretch over an area larger than Germany where there is
neither water nor towns.Yet sitting in the midst of the surrounding desert is the town of Bilma. Suddenly there
are pools of clear water. Surprisingly,there are groves of date palms.Underground water resources,or oases,
sufficient to support irrigated agriculture are found in dry stream beds and depressions.Irrigation ditches run
off a creek to water fields.Corn,cassava,tea,peanuts,hot peppers,and orange,lime,and grapefruit trees grow
in these fields.Donkeys and goats graze on green grass.
The Sahara of Niger is still a region where you can see a camel caravan of 500 camels tied together in
loose lines as long as a mile,traveling toward such oasis towns.There a caravan will collect life-sustaining
salt,which is mined from watery basins,and transport it up to 400 miles back to settlements on the edges of
the desert.The round trip across the vast sands takes one month.The Sahara can be described as_______.A:a place of contrastsB:a place where no one livesC:an area where the winters are coldD:an area that appeals to many tourists
选项 The Sahara can be described as_______.
A:a place of contrasts
B:a place where no one lives
C:an area where the winters are cold
D:an area that appeals to many tourists
答案 A
解析 本题问的是：这篇文章主要讲了什么？本文主要介绍了撒哈拉沙漠的地理位置、气候 概况、农业和交通运输状况。B选项范围过宽。C选项不全面，文章不只介绍了比尔马的情 况。D选项文中没有具体介绍。所以A是对的。
本题问的是：在撒哈拉的绝大多数地区，降雨情况如何？根据第一段的最后一句话，撒 哈拉的绝大多数地区每年降雨量低干5英寸。所以A正确。
本题问的是：撒哈拉沙漠可以被描述成什么？A项的意思是，一个具有强烈对比的地 方。B项的意思是青无人烟的地方。C项的意思是冬天很冷的地区：D项的意思是吸引很多 游客的地方。B、C、D项均不符合文意，A项说的对比可以在湿度高低、沙漠与绿洲的对比等方 面找到，因此A正确。
本题间的是：短语“大约和美国大小相当的地区”指的是什么地方的大小7根据第一段 的第二句话可知，本句的主语是撒哈拉沙漠。因此C止确。
本题问的是：文中“caravan”的意思是什么？A项的意思是旅行马戏团：C项是火车。B 项是又小又快的帆船。根据文中的介绍，穿过沙漠的驼队由上百只骆驼组成，来到绿洲城镇收 集盐，因此B选项“一群人一起穿过条件恶劣的国家”是正确的。第5部分：补全短文
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