六级冲刺练习：阅读（133）
<p> <span word="Logically">Logically</span>, <span word="therefore">therefore</span>, <span word="research">research</span> <span word="to">to</span> <span word="solve">solve</span> <span word="problems">problems</span> <span word="is">is</span> <span word="a">a</span> <span word="major">major</span> <span word="job">job</span> <span word="of">of</span> <span word="the">the</span> <span word="Forest">Forest</span> <span word="Service">Service</span>. <span word="It">It</span> <span word="covers">covers</span> <span word="the">the</span> <span word="whole">whole</span> <span word="forestry">forestry</span> <span word="field">field</span>, <span word="including">including</span> <span word="the">the</span> <span word="protection">protection</span> <span word="and">and</span> <span word="management">management</span> <span word="of">of</span> <span word="forests">forests</span>, <span word="related">related</span> <span word="rangelands">rangelands</span>, <span word="and">and</span> <span word="water">water</span>-<span word="sheds">sheds</span>; <span word="utilization">utilization</span> <span word="of">of</span> <span word="forest">forest</span> <span word="products">products</span>; <span word="and">and</span> <span word="the">the</span> <span word="economic">economic</span> <span word="aspects">aspects</span> <span word="of">of</span> <span word="forestry">forestry</span>. <span word="The">The</span> <span word="Services">Services</span> <span word="regional">regional</span> <span word="forest">forest</span> <span word="and">and</span> <span word="range">range</span> <span word="experiment">experiment</span> <span word="stations">stations</span> <span word="and">and</span> <span word="its">its</span> <span word="Forest">Forest</span> <span word="Products">Products</span> <span word="Laboratory">Laboratory</span> <span word="are">are</span> <span word="constantly">constantly</span> <span word="making">making</span> <span word="new">new</span> <span word="forestry">forestry</span> <span word="studies">studies</span> <span word="throughout">throughout</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span> <span word="and">and</span> <span word="announcing">announcing</span> <span word="new">new</span> <span word="forestry">forestry</span> <span word="facts">facts</span>.</p><p> <span word="Redeeming">Redeeming</span> <span word="the">the</span> <span word="American">American</span> <span word="Chestnut">Chestnut</span>. <span word="Scientists">Scientists</span> <span word="have">have</span> <span word="long">long</span> <span word="been">been</span> <span word="seeking">seeking</span> <span word="ways">ways</span> <span word="of">of</span> <span word="bringing">bringing</span> <span word="back">back</span> <span word="that">that</span> <span word="valuable">valuable</span> <span word="and">and</span> <span word="storied">storied</span> <span word="tree">tree</span>, <span word="the">the</span> <span word="American">American</span> <span word="chestnut">chestnut</span>. <span word="Attacked">Attacked</span> <span word="by">by</span> <span word="a">a</span> <span word="blight">blight</span> <span word="brought">brought</span> <span word="in">in</span> <span word="from">from</span> <span word="Asia">Asia</span> <span word="about">about</span> 1900, <span word="practically">practically</span> <span word="all">all</span> <span word="of">of</span> <span word="our">our</span> <span word="native">native</span> <span word="chestnuts">chestnuts</span> <span word="were">were</span> <span word="killed">killed</span>. <span word="Their">Their</span> <span word="gaunt">gaunt</span> <span word="white">white</span> <span word="skeletons">skeletons</span> <span word="are">are</span> <span word="a">a</span> <span word="reminder">reminder</span> <span word="of">of</span> <span word="a">a</span> <span word="tree">tree</span> <span word="whose">whose</span> <span word="range">range</span> <span word="extended">extended</span> <span word="from">from</span> <span word="New">New</span> <span word="England">England</span> <span word="to">to</span> <span word="Alabama">Alabama</span> <span word="and">and</span> <span word="Louisiana">Louisiana</span>. <span word="But">But</span> <span word="there">there</span> <span word="is">is</span> <span word="a">a</span> <span word="glimmer">glimmer</span> <span word="of">of</span> <span word="hope">hope</span>. <span word="Forest">Forest</span> <span word="Service">Service</span> <span word="scientists">scientists</span> <span word="have">have</span> <span word="found">found</span> <span word="a">a</span> <span word="few">few</span> <span word="individual">individual</span> <span word="trees">trees</span> <span word="that">that</span> <span word="seem">seem</span> <span word="to">to</span> <span word="be">be</span> <span word="resistant">resistant</span> <span word="to">to</span> <span word="the">the</span> <span word="disease">disease</span>. <span word="Buds">Buds</span> <span word="or">or</span> <span word="branches">branches</span> <span word="from">from</span> 28 <span word="of">of</span> <span word="these">these</span> <span word="tough">tough</span> <span word="survivors">survivors</span> <span word="have">have</span> <span word="been">been</span> <span word="grafted">grafted</span> <span word="to">to</span> <span word="other">other</span> <span word="root">root</span> <span word="stocks">stocks</span> <span word="for">for</span> <span word="multiplication">multiplication</span> <span word="and">and</span> <span word="the">the</span> <span word="chance">chance</span> <span word="for">for</span> <span word="further">further</span> <span word="study">study</span> <span word="of">of</span> <span word="their">their</span> <span word="resistance">resistance</span>. <span word="Forest">Forest</span> <span word="research">research</span> <span word="may">may</span> <span word="yet">yet</span> <span word="make">make</span> <span word="the">the</span> <span word="American">American</span> <span word="chestnut">chestnut</span> <span word="once">once</span> <span word="again">again</span> <span word="tempt">tempt</span> <span word="the">the</span> <span word="palate">palate</span> , <span word="and">and</span> <span word="also">also</span> <span word="help">help</span> <span word="supply">supply</span> <span word="the">the</span> <span word="nations">nations</span> <span word="timber">timber</span> <span word="needs">needs</span>.</p><p> <span word="Can">Can</span> <span word="Lightning">Lightning</span> <span word="Fires">Fires</span> <span word="Be">Be</span> <span word="Prevented">Prevented</span>? <span word="Foresters">Foresters</span> <span word="have">have</span> <span word="a">a</span> <span word="hard">hard</span> <span word="job">job</span> <span word="making">making</span> <span word="people">people</span> <span word="careful">careful</span> <span word="with">with</span> <span word="fire">fire</span> <span word="in">in</span> <span word="the">the</span> <span word="forests">forests</span>. <span word="At">At</span> <span word="the">the</span> <span word="same">same</span> <span word="time">time</span>, <span word="some">some</span> <span word="of">of</span> <span word="them">them</span> <span word="are">are</span> <span word="trying">trying</span> <span word="to">to</span> <span word="make">make</span> <span word="Nature">Nature</span> <span word="cut">cut</span> <span word="down">down</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="fires">fires</span> <span word="she">she</span> <span word="starts">starts</span> <span word="with">with</span> <span word="her">her</span> <span word="most">most</span> <span word="powerful">powerful</span> <span word="fire">fire</span>-<span word="starting">starting</span> <span word="weapon">weapon</span>, <span word="lightning">lightning</span>.</p>
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