职称英语理工类B级阅读理解题必备练习(2)
<p> <span word="Severe">Severe</span> <span word="turbulence">turbulence</span> <span word="can">can</span> <span word="kill">kill</span> <span word="aircraft">aircraft</span> <span word="passengers">passengers</span>. <span word="Now">Now</span>, <span word="in">in</span> <span word="test">test</span> <span word="flights">flights</span> <span word="over">over</span> <span word="the">the</span> <span word="Rocky">Rocky</span> <span word="Mountains">Mountains</span>, <span word="NASA">NASA</span> <span word="engineers">engineers</span> <span word="have">have</span> <span word="successfully">successfully</span> <span word="detected">detected</span> <span word="clear">clear</span>-<span word="air">air</span> <span word="turbulence">turbulence</span> <span word="up">up</span> <span word="to">to</span> 10 <span word="seconds">seconds</span> <span word="before">before</span> <span word="an">an</span> <span word="aircraft">aircraft</span> <span word="hits">hits</span> <span word="it">it</span>. <span word="However">However</span>, <span word="passengers">passengers</span> <span word="can">can</span> <span word="avoid">avoid</span> <span word="serious">serious</span> <span word="injury">injury</span> <span word="by">by</span> <span word="fastening">fastening</span> <span word="their">their</span> <span word="seatbelts">seatbelts</span>. <span word="It">It</span> <span word="is">is</span> <span word="the">the</span> <span word="only">only</span> <span word="antidote">antidote</span> <span word="for">for</span> <span word="this">this</span> <span word="sort">sort</span> <span word="of">of</span> <span word="thing">thing</span>, <span word="says">says</span> <span word="Rod">Rod</span> <span word="Bogue">Bogue</span>, <span word="project">project</span> <span word="manager">manager</span> <span word="at">at</span> <span word="NASAs">NASAs</span> <span word="The">The</span> <span word="centres">centres</span> <span word="new">new</span> <span word="turbulence">turbulence</span> <span word="detector">detector</span> <span word="is">is</span> <span word="based">based</span> <span word="on">on</span> <span word="lidar">lidar</span>, <span word="or">or</span> <span word="laser">laser</span>, <span word="radar">radar</span>. <span word="Laser">Laser</span> <span word="pulses">pulses</span> <span word="are">are</span> <span word="sent">sent</span> <span word="ahead">ahead</span> <span word="of">of</span> <span word="the">the</span> <span word="plane">plane</span> <span word="and">and</span> <span word="these">these</span> <span word="are">are</span> <span word="then">then</span> <span word="reflected">reflected</span> <span word="back">back</span> <span word="by">by</span> <span word="particles">particles</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span>. <span word="The">The</span> <span word="technique">technique</span> <span word="depends">depends</span> <span word="on">on</span> <span word="the">the</span> <span word="Doppler">Doppler</span> <span word="Effect">Effect</span>. <span word="The">The</span> <span word="wavelength">wavelength</span> <span word="of">of</span> <span word="the">the</span> <span word="light">light</span> <span word="shifts">shifts</span> <span word="according">according</span> <span word="to">to</span> <span word="the">the</span> <span word="speed">speed</span> <span word="at">at</span> <span word="which">which</span> <span word="the">the</span> <span word="particles">particles</span> <span word="are">are</span> <span word="approaching">approaching</span>. <span word="In">In</span> <span word="calm">calm</span> <span word="air">air</span>, <span word="the">the</span> <span word="speed">speed</span> <span word="equals">equals</span> <span word="the">the</span> <span word="planes">planes</span> <span word="airspeed">airspeed</span>. <span word="But">But</span> <span word="as">as</span> <span word="the">the</span> <span word="particles">particles</span> <span word="swirl">swirl</span> <span word="in">in</span> <span word="rough">rough</span> <span word="air">air</span>, <span word="their">their</span> <span word="speed">speed</span> <span word="of">of</span> <span word="approach">approach</span> <span word="increases">increases</span> <span word="or">or</span> <span word="decreases">decreases</span> <span word="rapidly">rapidly</span>. <span word="The">The</span> <span word="rate">rate</span> <span word="of">of</span> <span word="change">change</span> <span word="in">in</span> <span word="speed">speed</span> <span word="corresponds">corresponds</span> <span word="to">to</span> <span word="the">the</span> <span word="severity">severity</span> <span word="of">of</span> <span word="the">the</span> <span word="turbulence">turbulence</span>. <span word="Bogue">Bogue</span> <span word="says">says</span> <span word="that">that</span> <span word="he">he</span> <span word="had">had</span> <span word="a">a</span> <span word="comfortable">comfortable</span> <span word="amount">amount</span> <span word="of">of</span> <span word="time">time</span> <span word="to">to</span> <span word="fasten">fasten</span> <span word="his">his</span> <span word="seatbelt">seatbelt</span>. <span word="The">The</span> <span word="researchers">researchers</span> <span word="are">are</span> <span word="planning">planning</span> <span word="to">to</span> <span word="improve">improve</span> <span word="the">the</span> <span word="lidars">lidars</span> <span word="range">range</span> <span word="with">with</span> <span word="a">a</span> <span word="more">more</span> <span word="powerful">powerful</span> <span word="beam">beam</span>. <span word="The">The</span> <span word="system">system</span> <span word="could">could</span> <span word="be">be</span> <span word="installed">installed</span> <span word="on">on</span> <span word="commercial">commercial</span> <span word="aircraft">aircraft</span> <span word="in">in</span> <span word="the">the</span> <span word="next">next</span> <span word="few">few</span> <span word="years">years</span>. <span word="A">A</span> <span word="A">A</span> <span word="not">not</span> <span word="very">very</span> <span word="rough">rough</span> <span word="storm">storm</span>. <span word="C">C</span> <span word="A">A</span> <span word="kind">kind</span> <span word="of">of</span> <span word="visible">visible</span> <span word="storm">storm</span>. 37 <span word="In">In</span> <span word="December">December</span> 1997, <span word="a">a</span> <span word="United">United</span> <span word="Airlines">Airlines</span> <span word="flight">flight</span> <span word="hit">hit</span> <span word="unexpected">unexpected</span> <span word="rough">rough</span> <span word="air">air</span> <span word="B">B</span> <span word="throwing">throwing</span> <span word="its">its</span> <span word="passengers">passengers</span> <span word="out">out</span> <span word="of">of</span> <span word="the">the</span> <span word="cabin">cabin</span>. <span word="D">D</span> <span word="forcing">forcing</span> <span word="the">the</span> <span word="pilot">pilot</span> <span word="to">to</span> <span word="make">make</span> <span word="an">an</span> <span word="emergency">emergency</span> <span word="landing">landing</span>. <span word="A">A</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="the">the</span> <span word="plane">plane</span>. <span word="C">C</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="particles">particles</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span>. 39 <span word="We">We</span> <span word="can">can</span> <span word="infer">infer</span> <span word="from">from</span> <span word="the">the</span> <span word="fifth">fifth</span> <span word="paragraph">paragraph</span> <span word="that">that</span> <span word="B">B</span> <span word="researchers">researchers</span> <span word="are">are</span> <span word="not">not</span> <span word="sure">sure</span> <span word="about">about</span> <span word="the">the</span> <span word="effectiveness">effectiveness</span> <span word="of">of</span> <span word="the">the</span> <span word="lidar">lidar</span> <span word="detector">detector</span>. <span word="D">D</span> <span word="no">no</span> <span word="more">more</span> <span word="test">test</span> <span word="flights">flights</span> <span word="are">are</span> <span word="needed">needed</span>. <span word="A">A</span> <span word="the">the</span> <span word="lidar">lidar</span> <span word="detector">detector</span> <span word="needs">needs</span> <span word="improvement">improvement</span>. <span word="C">C</span> <span word="passengers">passengers</span> <span word="often">often</span> <span word="forget">forget</span> <span word="to">to</span> <span word="fasten">fasten</span> <span word="their">their</span> <span word="seatbelts">seatbelts</span>. 【参考答案】36. <span word="B">B</span>37. <span word="C">C</span>38. <span word="D">D</span>39. <span word="A">A</span>40. <span word="A">A</span></p>
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