GRE阅读经典文章实例分析：病原体
<p> 本文为大家准备了<span word="GRE">GRE</span>阅读经典文章实例分析，便于考生<span word="GRE">GRE</span>考试备考。</p><p> <span word="Ingestion">Ingestion</span> <span word="of">of</span> <span word="food">food</span> <span word="containing">containing</span> <span word="spores">spores</span> <span word="of">of</span> <span word="the">the</span> <span word="pathogen">pathogen</span> <span word="Ascosphaera">Ascosphaera</span> <span word="apis">apis</span> <span word="causes">causes</span> <span word="a">a</span> <span word="fatal">fatal</span> <span word="fungal">fungal</span> <span word="disease">disease</span> <span word="known">known</span> <span word="as">as</span> <span word="chalk">chalk</span> <span word="brood">brood</span> <span word="in">in</span> <span word="honeybee">honeybee</span> <span word="larvae">larvae</span>. <span word="However">However</span>, <span word="larvae">larvae</span> <span word="must">must</span> <span word="be">be</span> <span word="chilled">chilled</span> <span word="to">to</span> <span word="about">about</span> 30<span word="C">C</span> <span word="for">for</span> <span word="the">the</span> <span word="disease">disease</span> <span word="to">to</span> <span word="develop">develop</span>. <span word="Accordingly">Accordingly</span>, <span word="chalk">chalk</span> <span word="brood">brood</span> <span word="is">is</span> <span word="most">most</span> <span word="common">common</span> <span word="in">in</span> <span word="spring">spring</span> <span word="and">and</span> <span word="in">in</span> <span word="small">small</span> <span word="colonies">colonies</span>. <span word="A">A</span> <span word="recent">recent</span> <span word="study">study</span> <span word="revealed">revealed</span> <span word="that">that</span> <span word="honeybees">honeybees</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="hive">hive</span>-<span word="temperature">temperature</span> <span word="maintenance">maintenance</span> <span word="purposely">purposely</span> <span word="raised">raised</span> <span word="the">the</span> <span word="hives">hives</span> <span word="temperature">temperature</span> <span word="when">when</span> <span word="colonies">colonies</span> <span word="were">were</span> <span word="inoculated">inoculated</span> <span word="with">with</span> <span word="A">A</span>.<span word="apis">apis</span>. <span word="this">this</span> <span word="fever">fever</span>, <span word="or">or</span> <span word="up">up</span>-<span word="regulation">regulation</span> <span word="of">of</span> <span word="temperature">temperature</span>, <span word="occurred">occurred</span> <span word="before">before</span> <span word="any">any</span> <span word="larvae">larvae</span> <span word="died">died</span>, <span word="suggesting">suggesting</span> <span word="that">that</span> <span word="the">the</span> <span word="response">response</span> <span word="is">is</span> <span word="preventative">preventative</span> <span word="and">and</span> <span word="that">that</span> <span word="either">either</span> <span word="honeybee">honeybee</span> <span word="workers">workers</span> <span word="detect">detect</span> <span word="the">the</span> <span word="infection">infection</span> <span word="before">before</span> <span word="symptoms">symptoms</span> <span word="are">are</span> <span word="visible">visible</span> <span word="or">or</span> <span word="larvae">larvae</span> <span word="communicate">communicate</span> <span word="the">the</span> <span word="ingestion">ingestion</span> <span word="of">of</span> <span word="the">the</span> <span word="pathogen">pathogen</span>.</p><p> <span word="Temperature">Temperature</span> <span word="returned">returned</span> <span word="to">to</span> <span word="normal">normal</span> <span word="by">by</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="study">study</span>, <span word="suggesting">suggesting</span> <span word="that">that</span> <span word="increased">increased</span> <span word="temperature">temperature</span> <span word="is">is</span> <span word="not">not</span> <span word="optimal">optimal</span> <span word="when">when</span> <span word="broods">broods</span> <span word="are">are</span> <span word="not">not</span> <span word="infected">infected</span>, <span word="as">as</span> <span word="well">well</span> <span word="as">as</span> <span word="that">that</span> <span word="the">the</span> <span word="fever">fever</span> <span word="does">does</span> <span word="not">not</span> <span word="result">result</span> <span word="merely">merely</span> <span word="from">from</span> <span word="normal">normal</span> <span word="colony">colony</span> <span word="growth">growth</span> .</p><p> 【文章说了一种病原体,简称<span word="A">A</span>病原体.蜜蜂幼虫吃了含有<span word="A">A</span>的食物之后,体内会长一种致命的菌简称<span word="CB">CB</span>.但是<span word="CB">CB</span>要在低于幼虫正常体温的情况下才会发作,所以<span word="CB">CB</span>主要是在春天侵害小规模的蜜蜂群. 最近一个研究发现.在蜂群感染了<span word="A">A</span>之后,那些负责维持蜂房温度的蜜蜂会有意识地提高蜂房温度. 而这个发烧现象,或者说温度的提升是在没有一个幼虫死亡之前发生的.可能说明蜜蜂的这一反应是一个保护性措施.而且要么是那些蜜蜂在感染症状出现之前就发现了它们,要么就是幼虫把感染信息告诉了蜜蜂. 实验结束的时候,又恢复正常了,说明升高的温度并不是蜂群的最佳温度,也说明这个发烧现象不仅仅是蜂群数量增大的结果.】</p>
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