考前30天之备战2017高考英语精品学案：专题三阅读理解 第二节阅读理解梯度进阶训练2
<p> 第二节阅读理解梯度进阶训练</p><p> （2）</p><p> <span word="More">More</span> <span word="than">than</span> <span word="one">one</span> <span word="and">and</span> <span word="a">a</span> <span word="half">half</span> <span word="billion">billion</span> <span word="people">people</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span> <span word="live">live</span> <span word="without">without</span> <span word="electricity">electricity</span>. <span word="Finding">Finding</span> <span word="better">better</span> <span word="ways">ways</span> <span word="to">to</span> <span word="bring">bring</span> <span word="light">light</span> <span word="to">to</span> <span word="the">the</span> <span word="poor">poor</span> <span word="is">is</span> <span word="the">the</span> <span word="goal">goal</span> <span word="of">of</span> <span word="researchers">researchers</span> <span word="like">like</span> <span word="David">David</span> <span word="Irvine">Irvine</span><span word="Halliday">Halliday</span>.</p><p> <span word="In">In</span> <span word="the">the</span> <span word="late">late</span> 1990<span word="s">s</span>, <span word="the">the</span> <span word="Canadian">Canadian</span> <span word="professor">professor</span> <span word="was">was</span> <span word="working">working</span> <span word="in">in</span> <span word="Nepal">Nepal</span> <span word="when">when</span> <span word="his">his</span> <span word="return">return</span> <span word="flight">flight</span> <span word="was">was</span> <span word="cancelled">cancelled</span>. <span word="A">A</span> <span word="delay">delay</span> <span word="gave">gave</span> <span word="him">him</span> <span word="time">time</span> <span word="to">to</span> <span word="take">take</span> <span word="a">a</span> <span word="fourteen">fourteen</span><span word="day">day</span> <span word="hiking">hiking</span> <span word="trip">trip</span> <span word="in">in</span> <span word="the">the</span> <span word="Himalayas">Himalayas</span>.</p><p> <span word="As">As</span> <span word="he">he</span> <span word="tells">tells</span> <span word="it">it</span>, <span word="one">one</span> <span word="day">day</span> <span word="he">he</span> <span word="looked">looked</span> <span word="in">in</span> <span word="the">the</span> <span word="window">window</span> <span word="of">of</span> <span word="a">a</span> <span word="school">school</span> <span word="and">and</span> <span word="noticed">noticed</span> <span word="how">how</span> <span word="dark">dark</span> <span word="it">it</span> <span word="was">was</span>. <span word="This">This</span> <span word="is">is</span> <span word="a">a</span> <span word="common">common</span> <span word="problem">problem</span> <span word="for">for</span> <span word="millions">millions</span> <span word="of">of</span> <span word="children">children</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span>—<span word="and">and</span> <span word="not">not</span> <span word="just">just</span> <span word="at">at</span> <span word="school">school</span>, <span word="but">but</span> <span word="also">also</span> <span word="at">at</span> <span word="home">home</span>.</p><p> <span word="Many">Many</span> <span word="families">families</span> <span word="use">use</span> <span word="kerosene">kerosene</span> <span word="oil">oil</span> <span word="lamps">lamps</span>. <span word="There">There</span> <span word="are">are</span> <span word="many">many</span> <span word="problems">problems</span> <span word="with">with</span> <span word="these">these</span> <span word="lamps">lamps</span>. <span word="They">They</span> <span word="produce">produce</span> <span word="only">only</span> <span word="a">a</span> <span word="small">small</span> <span word="amount">amount</span> <span word="of">of</span> <span word="light">light</span>. <span word="They">They</span> <span word="are">are</span> <span word="dangerous">dangerous</span> <span word="to">to</span> <span word="breathe">breathe</span>. <span word="And">And</span> <span word="they">they</span> <span word="are">are</span> <span word="a">a</span> <span word="big">big</span> <span word="fire">fire</span> <span word="danger">danger</span>, <span word="causing">causing</span> <span word="many">many</span> <span word="injuries">injuries</span> <span word="and">and</span> <span word="deaths">deaths</span> <span word="each">each</span> <span word="year">year</span>.</p><p> <span word="Kerosene">Kerosene</span> <span word="costs">costs</span> <span word="less">less</span> <span word="than">than</span> <span word="other">other</span> <span word="forms">forms</span> <span word="of">of</span> <span word="lighting">lighting</span>, <span word="but">but</span> <span word="it">it</span> <span word="is">is</span> <span word="still">still</span> <span word="costly">costly</span> <span word="in">in</span> <span word="poor">poor</span> <span word="countries">countries</span>. <span word="Professor">Professor</span> <span word="Irvine">Irvine</span><span word="Halliday">Halliday</span> <span word="says">says</span> <span word="many">many</span> <span word="people">people</span> <span word="spend">spend</span> <span word="well">well</span> <span word="over">over</span> <span word="one">one</span> <span word="hundred">hundred</span> <span word="dollars">dollars</span> <span word="a">a</span> <span word="year">year</span> <span word="on">on</span> <span word="the">the</span> <span word="fuel">fuel</span>.</p><p> <span word="When">When</span> <span word="he">he</span> <span word="returned">returned</span> <span word="to">to</span> <span word="Canada">Canada</span>, <span word="he">he</span> <span word="began">began</span> <span word="researching">researching</span> <span word="ways">ways</span> <span word="to">to</span> <span word="provide">provide</span> <span word="safe">safe</span>, <span word="clean">clean</span> <span word="and">and</span> <span word="affordable">affordable</span> <span word="lighting">lighting</span>. <span word="He">He</span> <span word="began">began</span> <span word="experimenting">experimenting</span> <span word="with">with</span> <span word="light">light</span><span word="emitting">emitting</span> <span word="diodes">diodes</span>, <span word="LEDs">LEDs</span>, <span word="at">at</span> <span word="his">his</span> <span word="laboratory">laboratory</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Calgary">Calgary</span> <span word="in">in</span> <span word="Alberta">Alberta</span>. <span word="As">As</span> <span word="a">a</span> <span word="professor">professor</span> <span word="of">of</span> <span word="renewable">renewable</span> <span word="energy">energy</span>, <span word="he">he</span> <span word="already">already</span> <span word="knew">knew</span> <span word="about">about</span> <span word="the">the</span> <span word="technology">technology</span>. <span word="Light">Light</span><span word="emitting">emitting</span> <span word="diodes">diodes</span> <span word="are">are</span> <span word="small">small</span> <span word="glass">glass</span> <span word="lamps">lamps</span> <span word="that">that</span> <span word="use">use</span> <span word="much">much</span> <span word="less">less</span> <span word="electricity">electricity</span> <span word="than">than</span> <span word="traditional">traditional</span> <span word="bulbs">bulbs</span> <span word="and">and</span> <span word="last">last</span> <span word="much">much</span> <span word="longer">longer</span>.</p>
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