职称英语《综合类》C级阅读理解精选练习题(3)
<p> <span word="The">The</span> <span word="Sahara">Sahara</span></p><p> <span word="The">The</span> <span word="name">name</span> <span word="Sahara">Sahara</span> <span word="derives">derives</span> <span word="from">from</span> <span word="the">the</span> <span word="Arabic">Arabic</span> <span word="word">word</span> <span word="for">for</span> <span word="desert">desert</span> <span word="or">or</span> <span word="steppe">steppe</span>. <span word="At">At</span> 3. 5 <span word="million">million</span> <span word="square">square</span> <span word="miles">miles</span>，<span word="an">an</span> <span word="area">area</span> <span word="roughly">roughly</span> <span word="the">the</span> <span word="size">size</span> <span word="of">of</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span>，<span word="the">the</span> <span word="Sahara">Sahara</span> <span word="Desert">Desert</span> <span word="in">in</span> <span word="northern">northern</span> <span word="Africa">Africa</span> <span word="is">is</span> <span word="the">the</span> <span word="largest">largest</span> <span word="desert">desert</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span>. <span word="lt">lt</span> <span word="spans">spans</span> <span word="the">the</span> <span word="continent">continent</span> <span word="from">from</span> <span word="the">the</span> <span word="Atlantic">Atlantic</span> <span word="Ocean">Ocean</span> <span word="to">to</span> <span word="the">the</span> <span word="Red">Red</span> <span word="Sea">Sea</span>. <span word="Daytime">Daytime</span> <span word="temperatures">temperatures</span> <span word="can">can</span> <span word="reach">reach</span> <span word="as">as</span> <span word="high">high</span> <span word="as">as</span> 130<span word="F">F</span>. <span word="The">The</span> <span word="humidity">humidity</span> <span word="sometimes">sometimes</span> <span word="gets">gets</span> <span word="into">into</span> <span word="the">the</span> <span word="teens">teens</span>. <span word="But">But</span> <span word="it">it</span> <span word="can">can</span> <span word="also">also</span> <span word="be">be</span> <span word="as">as</span> <span word="low">low</span> <span word="as">as</span> 2. 5 <span word="percent">percent</span>，<span word="the">the</span> <span word="lowest">lowest</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span>. <span word="Most">Most</span> <span word="of">of</span> <span word="the">the</span> <span word="Sahara">Sahara</span> <span word="receives">receives</span> <span word="less">less</span> <span word="than">than</span> <span word="five">five</span> <span word="inches">inches</span> <span word="of">of</span> <span word="rain">rain</span> <span word="per">per</span> <span word="year">year</span>，<span word="while">while</span> <span word="large">large</span> <span word="areas">areas</span> <span word="sometimes">sometimes</span> <span word="have">have</span> <span word="no">no</span> <span word="rainfall">rainfall</span> <span word="at">at</span> <span word="all">all</span> <span word="for">for</span> <span word="years">years</span>.</p><p> <span word="At">At</span> <span word="the">the</span> <span word="heart">heart</span> <span word="of">of</span> <span word="the">the</span> <span word="Sahara">Sahara</span> <span word="is">is</span> <span word="the">the</span> <span word="landlocked">landlocked</span> <span word="north">north</span> <span word="African">African</span> <span word="country">country</span> <span word="of">of</span> <span word="Niger">Niger</span>. <span word="Here">Here</span> <span word="the">the</span> <span word="sand">sand</span> <span word="dunes">dunes</span> <span word="can">can</span> <span word="be">be</span> 100 <span word="feet">feet</span> <span word="tall">tall</span> <span word="and">and</span> <span word="several">several</span> <span word="miles">miles</span> <span word="long">long</span>. <span word="Here">Here</span> <span word="sand">sand</span> <span word="plains">plains</span> <span word="stretch">stretch</span> <span word="over">over</span> <span word="an">an</span> <span word="area">area</span> <span word="larger">larger</span> <span word="than">than</span> <span word="Germany">Germany</span> <span word="where">where</span> <span word="there">there</span> <span word="is">is</span> <span word="neither">neither</span> <span word="water">water</span> <span word="nor">nor</span> <span word="towns">towns</span>. <span word="Yet">Yet</span> <span word="sitting">sitting</span> <span word="in">in</span> <span word="the">the</span> <span word="midst">midst</span> <span word="of">of</span> <span word="the">the</span> <span word="surrounding">surrounding</span> <span word="desert">desert</span> <span word="is">is</span> <span word="the">the</span> <span word="town">town</span> <span word="of">of</span> <span word="Bilma">Bilma</span>. <span word="Suddenly">Suddenly</span> <span word="there">there</span> <span word="are">are</span> <span word="pools">pools</span> <span word="of">of</span> <span word="cIear">cIear</span> <span word="water">water</span>. <span word="Surprisingly">Surprisingly</span>，<span word="there">there</span> <span word="are">are</span> <span word="groves">groves</span> <span word="of">of</span> <span word="date">date</span> <span word="palms">palms</span>. <span word="Underground">Underground</span> <span word="water">water</span> <span word="resources">resources</span>，<span word="or">or</span> <span word="oases">oases</span>，<span word="sufficient">sufficient</span> <span word="to">to</span> <span word="support">support</span> <span word="irrigated">irrigated</span> <span word="agriculture">agriculture</span> <span word="are">are</span> <span word="found">found</span> <span word="in">in</span> <span word="dry">dry</span> <span word="stream">stream</span> <span word="beds">beds</span> <span word="and">and</span> <span word="depressions">depressions</span>. <span word="Irrigation">Irrigation</span> <span word="ditches">ditches</span> <span word="run">run</span> <span word="off">off</span> <span word="a">a</span> <span word="creek">creek</span> <span word="to">to</span> <span word="water">water</span> <span word="fields">fields</span>. <span word="Corn">Corn</span>，<span word="cassava">cassava</span>，<span word="tea">tea</span>，<span word="peanuts">peanuts</span>，<span word="hot">hot</span> <span word="peppers">peppers</span>，<span word="and">and</span> <span word="orange">orange</span>，<span word="lime">lime</span>，<span word="and">and</span> <span word="grapefruit">grapefruit</span> <span word="trees">trees</span> <span word="grow">grow</span> <span word="in">in</span> <span word="these">these</span> <span word="fields">fields</span>. <span word="Donkeys">Donkeys</span> <span word="and">and</span> <span word="goats">goats</span> <span word="graze">graze</span> <span word="on">on</span> <span word="green">green</span> <span word="grass">grass</span>.</p><p> <span word="The">The</span> <span word="Sahara">Sahara</span> 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.</p>
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