2015考研英语阅读理解模拟试题一
<p> 2015复习正在如火如荼的进行中，考研专家建议可以按考研题型分别进行重点复习，是考研英语中分值最高的，在线小编特地整理了2015理解模拟试题供大家模拟练习，希望大家认真做题，错题着重看解析及译文，经过练习阅读理解能力必能有所提高。 <span word="Part">Part</span> <span word="A">A</span> <span word="Directions">Directions</span>: <span word="Read">Read</span> <span word="the">the</span> <span word="following">following</span> <span word="four">four</span> <span word="texts">texts</span>. <span word="Answer">Answer</span> <span word="the">the</span> <span word="questions">questions</span> <span word="below">below</span> <span word="each">each</span> <span word="text">text</span> <span word="by">by</span> <span word="choosing">choosing</span> <span word="A">A</span>, <span word="B">B</span>, <span word="C">C</span> <span word="or">or</span> <span word="D">D</span>. <span word="Mark">Mark</span> <span word="your">your</span> <span word="answers">answers</span> <span word="on">on</span> <span word="ANSWER">ANSWER</span> <span word="SHEET">SHEET</span> 1. 一、从鸡蛋中培养流感疫菌 <span word="Modern">Modern</span> <span word="technology">technology</span> <span word="has">has</span> <span word="put">put</span> <span word="men">men</span> <span word="on">on</span> <span word="the">the</span> <span word="moon">moon</span> <span word="and">and</span> <span word="deciphered">deciphered</span> <span word="the">the</span> <span word="human">human</span> <span word="genome">genome</span>. <span word="But">But</span> <span word="when">when</span> <span word="it">it</span> <span word="comes">comes</span> <span word="to">to</span> <span word="brewing">brewing</span> <span word="up">up</span> <span word="flu">flu</span> <span word="to">to</span> <span word="make">make</span> <span word="vaccines">vaccines</span>, <span word="science">science</span> <span word="still">still</span> <span word="turns">turns</span> <span word="to">to</span> <span word="the">the</span> <span word="incredible">incredible</span> <span word="edible">edible</span> <span word="egg">egg</span>. <span word="Ever">Ever</span> <span word="since">since</span> <span word="the">the</span> 1940<span word="s">s</span>, <span word="vaccine">vaccine</span> <span word="makers">makers</span> <span word="have">have</span> <span word="grown">grown</span> <span word="large">large</span> <span word="batches">batches</span> <span word="of">of</span> <span word="virus">virus</span> <span word="inside">inside</span> <span word="chicken">chicken</span> <span word="eggs">eggs</span>. <span word="But">But</span> <span word="given">given</span> <span word="that">that</span> <span word="some">some</span> 36,000 <span word="Americans">Americans</span> <span word="die">die</span> <span word="of">of</span> <span word="flu">flu</span> <span word="each">each</span> <span word="year">year</span>, <span word="its">its</span> <span word="remarkable">remarkable</span> <span word="that">that</span> <span word="our">our</span> <span word="first">first</span> <span word="line">line</span> <span word="of">of</span> <span word="defense">defense</span> <span word="is">is</span> <span word="still">still</span> <span word="what">what</span> <span word="Secretary">Secretary</span> <span word="of">of</span> <span word="Health">Health</span> <span word="and">and</span> <span word="Human">Human</span> <span word="Services">Services</span> <span word="Tommy">Tommy</span> <span word="Thompson">Thompson</span> <span word="calls">calls</span> <span word="the">the</span> <span word="cumbersome">cumbersome</span> <span word="and">and</span> <span word="archaic">archaic</span> <span word="egg">egg</span>-<span word="based">based</span> <span word="production">production</span>. <span word="New">New</span> <span word="cell">cell</span>-<span word="based">based</span> <span word="technologies">technologies</span> <span word="are">are</span> <span word="in">in</span> <span word="the">the</span> <span word="pipeline">pipeline</span>, <span word="however">however</span>, <span word="and">and</span> <span word="may">may</span> <span word="finally">finally</span> <span word="get">get</span> <span word="the">the</span> <span word="support">support</span> <span word="they">they</span> <span word="need">need</span> <span word="now">now</span> <span word="that">that</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span> <span word="is">is</span> <span word="faced">faced</span> <span word="with">with</span> <span word="a">a</span> <span word="critical">critical</span> <span word="shortage">shortage</span> <span word="of">of</span> <span word="flu">flu</span> <span word="vaccine">vaccine</span>. <span word="Although">Although</span> <span word="experts">experts</span> <span word="disagree">disagree</span> <span word="on">on</span> <span word="whether">whether</span> <span word="new">new</span> <span word="ways">ways</span> <span word="of">of</span> <span word="producing">producing</span> <span word="vaccine">vaccine</span> <span word="could">could</span> <span word="have">have</span> <span word="prevented">prevented</span> <span word="a">a</span> <span word="shortage">shortage</span> <span word="like">like</span> <span word="the">the</span> <span word="one">one</span> <span word="happening">happening</span> <span word="today">today</span>, <span word="there">there</span> <span word="is">is</span> <span word="no">no</span> <span word="doubt">doubt</span> <span word="that">that</span> <span word="the">the</span> <span word="existing">existing</span> <span word="system">system</span> <span word="has">has</span> <span word="serious">serious</span> <span word="flaws">flaws</span>. <span word="Each">Each</span> <span word="year">year</span>, <span word="vaccine">vaccine</span> <span word="manufacturers">manufacturers</span> <span word="place">place</span> <span word="advance">advance</span> <span word="orders">orders</span> <span word="for">for</span> <span word="millions">millions</span> <span word="of">of</span> <span word="specially">specially</span> <span word="grown">grown</span> <span word="chicken">chicken</span> <span word="eggs">eggs</span>. <span word="Meanwhile">Meanwhile</span>, <span word="public">public</span>-<span word="health">health</span> <span word="officials">officials</span> <span word="monitor">monitor</span> <span word="circulating">circulating</span> <span word="strains">strains</span> <span word="of">of</span> <span word="flu">flu</span>, <span word="and">and</span> <span word="each">each</span> <span word="March">March</span> <span word="they">they</span> <span word="recommend">recommend</span> <span word="three">three</span> <span word="strainstwo">strainstwo</span> <span word="influenza">influenza</span> <span word="A">A</span> <span word="strains">strains</span> <span word="and">and</span> <span word="one">one</span> <span word="B">B</span> <span word="strainfor">strainfor</span> <span word="manufacturers">manufacturers</span> <span word="to">to</span> <span word="include">include</span> <span word="in">in</span> <span word="vaccines">vaccines</span>. <span word="In">In</span> <span word="the">the</span> <span word="late">late</span> <span word="spring">spring</span> <span word="and">and</span> <span word="summer">summer</span>, <span word="automated">automated</span> <span word="machines">machines</span> <span word="inject">inject</span> <span word="virus">virus</span> <span word="into">into</span> <span word="eggs">eggs</span> <span word="and">and</span> <span word="later">later</span> <span word="suck">suck</span> <span word="out">out</span> <span word="the">the</span> <span word="influenza">influenza</span>-<span word="rich">rich</span> <span word="goop">goop</span>. <span word="Virus">Virus</span> <span word="from">from</span> <span word="the">the</span> <span word="eggs">eggs</span> <span word="innards">innards</span> <span word="gets">gets</span> <span word="killed">killed</span> <span word="and">and</span> <span word="processed">processed</span> <span word="to">to</span> <span word="remove">remove</span> <span word="egg">egg</span> <span word="proteins">proteins</span> <span word="and">and</span> <span word="other">other</span> <span word="contaminants">contaminants</span> <span word="before">before</span> <span word="being">being</span> <span word="packaged">packaged</span> <span word="into">into</span> <span word="vials">vials</span> <span word="for">for</span> <span word="fall">fall</span> <span word="shipment">shipment</span>. <span word="Why">Why</span> <span word="has">has</span> <span word="this">this</span> <span word="egg">egg</span> <span word="method">method</span> <span word="persisted">persisted</span> <span word="for">for</span> <span word="six">six</span> <span word="decades">decades</span>? <span word="The">The</span> <span word="main">main</span> <span word="reason">reason</span> <span word="is">is</span> <span word="that">that</span> <span word="its">its</span> <span word="reliable">reliable</span>. <span word="But">But</span> <span word="even">even</span> <span word="though">though</span> <span word="the">the</span> <span word="eggs">eggs</span> <span word="are">are</span> <span word="reliable">reliable</span>, <span word="they">they</span> <span word="have">have</span> <span word="serious">serious</span> <span word="drawbacks">drawbacks</span>. <span word="One">One</span> <span word="is">is</span> <span word="the">the</span> <span word="long">long</span> <span word="lead">lead</span> <span word="time">time</span> <span word="needed">needed</span> <span word="to">to</span> <span word="order">order</span> <span word="the">the</span> <span word="eggs">eggs</span>. <span word="That">That</span> <span word="means">means</span> <span word="its">its</span> <span word="hard">hard</span> <span word="to">to</span> <span word="make">make</span> <span word="more">more</span> <span word="vaccine">vaccine</span> <span word="in">in</span> <span word="a">a</span> <span word="hurry">hurry</span>, <span word="in">in</span> <span word="case">case</span> <span word="of">of</span> <span word="a">a</span> <span word="shortage">shortage</span> <span word="or">or</span> <span word="unexpected">unexpected</span> <span word="outbreak">outbreak</span>. <span word="And">And</span> <span word="eggs">eggs</span> <span word="may">may</span> <span word="simply">simply</span> <span word="be">be</span> <span word="too">too</span> <span word="cumbersome">cumbersome</span> <span word="to">to</span> <span word="keep">keep</span> <span word="up">up</span> <span word="with">with</span> <span word="the">the</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="millions">millions</span> <span word="of">of</span> <span word="doses">doses</span> <span word="required">required</span> <span word="to">to</span> <span word="handle">handle</span> <span word="the">the</span> <span word="demand">demand</span> <span word="for">for</span> <span word="flu">flu</span> <span word="vaccine">vaccine</span>. <span word="Whats">Whats</span> <span word="more">more</span>, <span word="some">some</span> <span word="flu">flu</span> <span word="strains">strains</span> <span word="dont">dont</span> <span word="grow">grow</span> <span word="well">well</span> <span word="in">in</span> <span word="eggs">eggs</span>. <span word="Last">Last</span> <span word="year">year</span>, <span word="scientists">scientists</span> <span word="were">were</span> <span word="unable">unable</span> <span word="to">to</span> <span word="include">include</span> <span word="the">the</span> <span word="Fujian">Fujian</span> <span word="strain">strain</span> <span word="in">in</span> <span word="the">the</span> <span word="vaccine">vaccine</span> <span word="formulation">formulation</span>. <span word="It">It</span> <span word="was">was</span> <span word="a">a</span> <span word="relatively">relatively</span> <span word="new">new</span> <span word="strain">strain</span>, <span word="and">and</span> <span word="manufacturers">manufacturers</span> <span word="simply">simply</span> <span word="couldnt">couldnt</span> <span word="find">find</span> <span word="a">a</span> <span word="quick">quick</span> <span word="way">way</span> <span word="to">to</span> <span word="adapt">adapt</span> <span word="it">it</span> <span word="so">so</span> <span word="that">that</span> <span word="it">it</span> <span word="grew">grew</span> <span word="well">well</span> <span word="in">in</span> <span word="eggs">eggs</span>. <span word="We">We</span> <span word="knew">knew</span> <span word="the">the</span> <span word="strain">strain</span> <span word="was">was</span> <span word="out">out</span> <span word="there">there</span>, <span word="recalls">recalls</span> <span word="Theodore">Theodore</span> <span word="Eickhoff">Eickhoff</span> <span word="of">of</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Colorado">Colorado</span> <span word="Health">Health</span> <span word="Sciences">Sciences</span> <span word="Center">Center</span>, <span word="but">but</span> <span word="public">public</span>-<span word="health">health</span> <span word="officials">officials</span> <span word="were">were</span> <span word="left">left</span> <span word="without">without</span> <span word="a">a</span> <span word="vaccineand">vaccineand</span>, <span word="consequently">consequently</span>, <span word="a">a</span> <span word="more">more</span> <span word="severe">severe</span> <span word="flu">flu</span> <span word="season">season</span>. <span word="Worse">Worse</span>, <span word="the">the</span> <span word="viruses">viruses</span> <span word="that">that</span> <span word="pose">pose</span> <span word="the">the</span> <span word="greatest">greatest</span> <span word="threat">threat</span> <span word="might">might</span> <span word="be">be</span> <span word="hardest">hardest</span> <span word="to">to</span> <span word="grow">grow</span> <span word="in">in</span> <span word="eggs">eggs</span>. <span word="Thats">Thats</span> <span word="because">because</span> <span word="global">global</span> <span word="pandemics">pandemics</span> <span word="like">like</span> <span word="the">the</span> <span word="one">one</span> <span word="that">that</span> <span word="killed">killed</span> <span word="over">over</span> 50 <span word="million">million</span> <span word="people">people</span> <span word="between">between</span> 1918 <span word="and">and</span> 1920 <span word="are">are</span> <span word="thought">thought</span> <span word="to">to</span> <span word="occur">occur</span> <span word="when">when</span> <span word="a">a</span> <span word="bird">bird</span> <span word="influenza">influenza</span> <span word="changes">changes</span> <span word="in">in</span> <span word="a">a</span> <span word="way">way</span> <span word="that">that</span> <span word="lets">lets</span> <span word="it">it</span> <span word="cross">cross</span> <span word="the">the</span> <span word="species">species</span> <span word="barrier">barrier</span> <span word="and">and</span> <span word="infect">infect</span> <span word="humans">humans</span>. <span word="Since">Since</span> <span word="humans">humans</span> <span word="havent">havent</span> <span word="encountered">encountered</span> <span word="the">the</span> <span word="new">new</span> <span word="virus">virus</span> <span word="before">before</span>, <span word="they">they</span> <span word="have">have</span> <span word="little">little</span> <span word="protective">protective</span> <span word="immunity">immunity</span>. <span word="The">The</span> <span word="deadly">deadly</span> <span word="bird">bird</span> <span word="flu">flu</span> <span word="circulating">circulating</span> <span word="in">in</span> <span word="Asia">Asia</span> <span word="in">in</span> 1997 <span word="and">and</span> 1998, <span word="for">for</span> <span word="example">example</span>, <span word="worried">worried</span> <span word="public">public</span>-<span word="health">health</span> <span word="officials">officials</span> <span word="because">because</span> <span word="it">it</span> <span word="spread">spread</span> <span word="to">to</span> <span word="some">some</span> <span word="people">people</span> <span word="who">who</span> <span word="handled">handled</span> <span word="birds">birds</span> <span word="and">and</span> <span word="killed">killed</span> <span word="themalthough">themalthough</span> <span word="the">the</span> <span word="bug">bug</span> <span word="never">never</span> <span word="circulated">circulated</span> <span word="among">among</span> <span word="humans">humans</span>. <span word="But">But</span> <span word="when">when</span> <span word="scientists">scientists</span> <span word="tried">tried</span> <span word="to">to</span> <span word="make">make</span> <span word="vaccine">vaccine</span> <span word="the">the</span> <span word="old">old</span>-<span word="fashioned">fashioned</span> <span word="way">way</span>, <span word="the">the</span> <span word="bird">bird</span> <span word="flu">flu</span> <span word="quickly">quickly</span> <span word="killed">killed</span> <span word="the">the</span> <span word="eggs">eggs</span>. 1.<span word="The">The</span> <span word="moon">moon</span>-<span word="landing">landing</span> <span word="is">is</span> <span word="mentioned">mentioned</span> <span word="in">in</span> <span word="the">the</span> <span word="first">first</span> <span word="paragraph">paragraph</span> <span word="to">to</span> <span word="illustrate">illustrate</span>_____. [<span word="A">A</span>] <span word="technology">technology</span> <span word="cannot">cannot</span> <span word="solve">solve</span> <span word="all">all</span> <span word="of">of</span> <span word="our">our</span> <span word="human">human</span> <span word="problems">problems</span> [<span word="B">B</span>] <span word="progress">progress</span> <span word="in">in</span> <span word="vaccine">vaccine</span> <span word="research">research</span> <span word="for">for</span> <span word="influenza">influenza</span> <span word="has">has</span> <span word="lagged">lagged</span> <span word="behind">behind</span> [<span word="C">C</span>] <span word="great">great</span> <span word="achievements">achievements</span> <span word="have">have</span> <span word="been">been</span> <span word="made">made</span> <span word="by">by</span> <span word="men">men</span> <span word="in">in</span> <span word="exploring">exploring</span> <span word="the">the</span> <span word="unknown">unknown</span> [<span word="D">D</span>] <span word="the">the</span> <span word="development">development</span> <span word="of">of</span> <span word="vaccine">vaccine</span> <span word="production">production</span> <span word="methods">methods</span> <span word="can">can</span> <span word="not">not</span> <span word="be">be</span> <span word="stopped">stopped</span> 2.<span word="What">What</span> <span word="step">step</span> <span word="is">is</span> <span word="essential">essential</span> <span word="to">to</span> <span word="the">the</span> <span word="traditional">traditional</span> <span word="production">production</span> <span word="of">of</span> <span word="flu">flu</span> <span word="vaccine">vaccine</span>? [<span word="A">A</span>] <span word="Manufacturers">Manufacturers</span> <span word="implant">implant</span> <span word="the">the</span> <span word="vaccine">vaccine</span> <span word="into">into</span> <span word="ordered">ordered</span> <span word="chicken">chicken</span> <span word="eggs">eggs</span>. [<span word="B">B</span>] <span word="Scientists">Scientists</span> <span word="identify">identify</span> <span word="the">the</span> <span word="exact">exact</span> <span word="strain">strain</span> <span word="soon">soon</span> <span word="after">after</span> <span word="a">a</span> <span word="flu">flu</span> <span word="pandemic">pandemic</span> <span word="starts">starts</span>. [<span word="C">C</span>] <span word="Public">Public</span> <span word="health">health</span> <span word="measures">measures</span> <span word="are">are</span> <span word="taken">taken</span> <span word="as">as</span> <span word="an">an</span> <span word="important">important</span> <span word="pandemic">pandemic</span>-<span word="fighting">fighting</span> <span word="tool">tool</span>. [<span word="D">D</span>] <span word="Viruses">Viruses</span> <span word="are">are</span> <span word="deadened">deadened</span> <span word="and">and</span> <span word="made">made</span> <span word="clean">clean</span> <span word="before">before</span> <span word="being">being</span> <span word="put">put</span> <span word="into">into</span> <span word="vaccine">vaccine</span> <span word="use">use</span>. 3.<span word="The">The</span> <span word="foremost">foremost</span> <span word="reason">reason</span> <span word="why">why</span> <span word="the">the</span> <span word="egg">egg</span>-<span word="based">based</span> <span word="method">method</span> <span word="is">is</span> <span word="defective">defective</span> <span word="lies">lies</span> <span word="in">in</span>_____. [<span word="A">A</span>] <span word="the">the</span> <span word="complex">complex</span> <span word="process">process</span> <span word="of">of</span> <span word="vaccine">vaccine</span> <span word="production">production</span> [<span word="B">B</span>] <span word="its">its</span> <span word="potential">potential</span> <span word="threat">threat</span> <span word="to">to</span> <span word="human">human</span> <span word="being">being</span> [<span word="C">C</span>] <span word="the">the</span> <span word="low">low</span> <span word="survival">survival</span> <span word="rate">rate</span> <span word="for">for</span> <span word="new">new</span> <span word="flu">flu</span> <span word="vaccines">vaccines</span> [<span word="D">D</span>] <span word="its">its</span> <span word="contribution">contribution</span> <span word="to">to</span> <span word="the">the</span> <span word="flu">flu</span> <span word="vaccine">vaccine</span> <span word="shortage">shortage</span> 4.<span word="Which">Which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="is">is</span> <span word="true">true</span> <span word="according">according</span> <span word="to">to</span> <span word="the">the</span> <span word="passage">passage</span>? [<span word="A">A</span>] <span word="Flu">Flu</span> <span word="vaccines">vaccines</span> <span word="now">now</span> <span word="mainly">mainly</span> <span word="use">use</span> <span word="egg">egg</span>-<span word="based">based</span> <span word="technology">technology</span>. [<span word="B">B</span>] <span word="A">A</span> <span word="bird">bird</span> <span word="influenza">influenza</span> <span word="has">has</span> <span word="once">once</span> <span word="circulated">circulated</span> <span word="among">among</span> <span word="humans">humans</span>. [<span word="C">C</span>] <span word="Safety">Safety</span> <span word="can">can</span> <span word="be">be</span> <span word="greatly">greatly</span> <span word="improved">improved</span> <span word="with">with</span> <span word="cell">cell</span>-<span word="culture">culture</span> <span word="vaccines">vaccines</span>. [<span word="D">D</span>] <span word="Modern">Modern</span> <span word="vaccine">vaccine</span> <span word="production">production</span> <span word="methods">methods</span> <span word="are">are</span> <span word="to">to</span> <span word="replace">replace</span> <span word="egg">egg</span>-<span word="based">based</span> <span word="methods">methods</span>. 5.<span word="In">In</span> <span word="the">the</span> <span word="authors">authors</span> <span word="view">view</span>, <span word="the">the</span> <span word="new">new</span> <span word="vaccine">vaccine</span> <span word="production">production</span> <span word="method">method</span> <span word="seems">seems</span> <span word="to">to</span> <span word="be">be</span>_____. [<span word="A">A</span>] <span word="remarkable">remarkable</span> [<span word="B">B</span>] <span word="criticized">criticized</span> [<span word="C">C</span>] <span word="efficient">efficient</span> [<span word="D">D</span>] <span word="accepted">accepted</span> 答案： 1.<span word="B">B</span> 2.<span word="D">D</span> 3.<span word="C">C</span> 4.<span word="A">A</span> 5.<span word="D">D</span> 核心词汇与超纲词汇 <span word="decipher">decipher</span>破译，辨认 <span word="genome">genome</span>基因组，染色体组 <span word="brew">brew</span>酿制，沏，煮;~ <span word="up">up</span>酝酿;即将来临 <span word="cumbersome">cumbersome</span>大而笨重的;繁琐的，复杂的 <span word="archaic">archaic</span>过时的，陈旧的;古代的，早期的 <span word="in">in</span> <span word="the">the</span> <span word="pipeline">pipeline</span>在准备中; 在完成中; 在进行中; 运输中; 即将送递 <span word="circulate">circulate</span>循环;传播，流传;传递，传阅 <span word="strain">strain</span>系，品系，品种 <span word="innards">innards</span>内脏，内部结构 <span word="pandemic">pandemic</span>广泛流传的，普遍的，流行的;传染病的;全国[全世界]性的流行病 <span word="lead">lead</span> <span word="time">time</span> 前置时间，指完成一个程序或作业所需要的一段时间。 全文翻译 现代技术已经把人类送上了月球，也破解了人类的基因组。但是当涉及到培养流感病毒生产疫苗时，令人难以置信的是科学家依然在使用可食用鸡蛋。自20世纪40年代以来，疫苗的生产者已经在鸡蛋里培植了大批的病毒。但是，考虑到每年有约3万6千美国人死于流感，有意思的是我们的第一防线依然是被美国健康和人类服务部部长汤米?汤普森称作为麻烦的陈旧的鸡蛋方法的生产。但是，新的细胞生产技术已经投入使用，并且由于美国现在面临的流感疫苗的严重短缺而可能最终得到它们所需要的支持。虽然专家就生产疫苗的新方法能否阻止现在出现的这种短缺现象无法达成共识，但是可以肯定的是现有的系统有严重的缺陷。 每一年疫苗的生产者会提前预定成百万的特别培育的鸡蛋。同时，公共健康官员监督正在流行的流感种类，并于每年3月推荐其中的三种，包括两种<span word="A">A</span>型和一种<span word="B">B</span>型流感，为生产者生产疫苗之用。在春末和夏季，由自动的机器将病毒注射到鸡蛋中，然后将充满流感病毒的粘性物质从中吸出。将鸡蛋内脏中的病毒杀死后加工，取出鸡蛋蛋白和其他的杂质，然而装入小瓶，用于秋季时的运输。 为什么这种鸡蛋方法持续了60年?重要原因是它可靠。但是尽管鸡蛋是可靠的，它们也有严重的缺陷。首先是订购鸡蛋所需要的前置时间很长。这意味着在突发的疫苗短缺状况下很难立刻生产更多的疫苗。要满足对流感疫苗的需求需要生产几百万的剂量，而使用鸡蛋也许跟不上这个速度。 而且一些种类的流行病毒在鸡蛋中不能很好地生长。去年，科学家没能够把福建型流感种类包括在疫苗的生产中。它是一种较新的病毒种类，生产者不能找到很快适应它的方法使它在鸡蛋中很好地生长。科罗拉多州大学健康科学中心的西奥多?艾克福回忆说，我们知道病毒种类在那里，但是这些公共健康官员没有疫苗，于是结果迎来了一场更严重的流感。 更糟糕的是，产生最大威胁的病毒也许是最难在鸡蛋中生长的。这是因为当禽流感改变方式跨越种族界限感染人类时，像1918年至1920年间杀死5000万人的那种全球性流行病就会爆发。由于人类在这之前没有遭遇这样的新病毒，他们的保护性免疫能力就很差。比如，1997年和1998年在亚洲流行的致命的禽流感使公共健康官员很担忧，因为它传播到一些接触禽类的人类身上并使他们死亡。虽然这种病菌还没有在人类中传播过，但当科学家试图用传统的方式生产疫苗时，禽流感迅速杀死了鸡蛋。</p>
页:
[1]