首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Although we already know a great deal about influenza, it is difficult for epidemiologists(流行病学家), who study infectious disease,
Although we already know a great deal about influenza, it is difficult for epidemiologists(流行病学家), who study infectious disease,
admin
2013-11-11
56
问题
Although we already know a great deal about influenza, it is difficult for epidemiologists(流行病学家), who study infectious disease, to【C1】______when and where the next flu epidemic will occur, and how【C2】______it will be. There are three kinds of influenza virus, known as A, B and C. Influenza C virus is relatively stable and causes mild【C3】______that do not spread far through the population. The A and B types are【C4】______, and are responsible for the epidemics that cause frequent concern. Following any virus attack, the human body builds up antibodies which confer(给予)immunity to that strain of virus, but a virus with the capacity to change its character is able to bypass this【C5】______. Variability is less developed in the influenza B virus, which affects only human beings. An influenza B virus may cause a widespread epidemic but will have little effect if【C6】______into the same community soon afterwards, since nearly everyone will have built up antibodies and will be immune. The influenza A virus, which【C7】______affects animals, is extremely unstable and is responsible for some of the worst outbreaks of the disease, such as the unparalleled pandemic, or world epidemic. Accurate prediction is difficult because of the complication of the【C8】______. A particular virus may be related to one to which some of the population have【C9】______involved immunity. The extent to which it will spread will depend on factors such as its own strength, or virulence, the ease with which it can be【C10】______and the strength of the opposition it encounters. Scientists, however, have a reliable general picture of the world situation, according to which we may take some precautions.
A)partially I)epidemics
B)guess J)also
C)factors K)attacks
D)equally L)introduced
E)generally M)unstable
F)protection N)infections
G)transmitted 0)predict
H)severe
【C5】
选项
答案
F
解析
此处应填名词。由this和句中的转折关系可知,所填词指的是抗体对病毒的免疫作用,因此选F)protec—tion“保护”。就选项K)attacks而言,人体对病毒免疫功能的实现包含对病毒的攻击,但是根据this可知K)at—tacks的复数形式在这里不合适,故排除。
转载请注明原文地址:https://kaotiyun.com/show/Ya27777K
0
大学英语六级
相关试题推荐
A、Manyprogramsareprovided.B、Itisdifficulttogetin.C、Students’feesareratherhigh.D、Studentshavemanychancestogo
Atranslatormusthaveanexcellent,up-to-dateknowledgeofhissourcelanguages.Hemustfillfacilityinthehandlingofhis
Pretendingtobehappycanactuallymakeyoumore【B1】______—especiallyifyou’reawoman,accordingtoanewstudy.Researc
A、ShemistookthemanforCarlSmith.B、Sheraisedtheman’spaybymistake.C、Shepraisedthewrongperson.D、Shealmostfired
A、Tomdoesn’tlikesurfing.B、Theydon’tknowTomquitewell.C、Tomisveryslowindoingthings.D、Tomistherightpersontod
A、Husbandshavetosharewiththeirwivesandhelpthem.B、Olderwomenoftenlivealonewhentheirhusbandsdie.C、Familystruct
Bookshaven’tchangedmuchsinceJohannGuttenburginventedtheprintingpressinthefifteenthcentury.Themethodsforproduci
Researchershaverecentlyfoundaconnectionbetweendiseasesandstressfulsituations.Totestthistheory,psychologistsaret
ReadingonCellphones1.手机阅读越来越流行2.分析出现这一现象的原因3.我的观点
OnlineLearning1.网上学习比较普遍2.产生这种现象的原因3.这种现象可能带来的影响
随机试题
A.Atriangletradecanbecarriedoutamongthethreeofus.B.Ifyou’reinterestedinleasingtrade,pleaseletusknow.C.W
有关AIDS的描述中,哪项是错误的:
诊断原发性甲状腺功能减退症最敏感的指标是
某县会计师行业自律委员会成立之初,达成统筹分配当地全行业整体收入的协议,要求当年市场份额提高的会员应分出自己的部分收入,补贴给市场份额降低的会员。事后,有会员向省级工商行政管理部门书面投诉。关于此事,下列哪些说法是正确的?(2016年卷一67题)
招标属于竞买方式,即一个卖方面对多个买方,买方之间的竞争使卖方在价格及其他条件上有较多的比较和选择。()
波浪理论和循环周期理论属于( )。
什刹海的现代北京胡同游兴起于()
随着我国银行卡用卡环境的持续改善,在线支付正被越来越多的消费者接受和使用。对银行卡用户而言,这不仅方便了国内的日常消费,也满足了境外消费的支付需求。这里的银行卡在线支付()。
否认意识形式的主观性,把意识看作是人脑的分泌物,这是
设α1,α2,α3,α4为4维列向量组,其中α4=α1+α2+2α3,记A=(α1-α2,α2+α3,-α1+aα2+α3),且方程组Ax=α4有无穷多解,求:(1)常数a的值。(2)方程组Ax=α4的通解。
最新回复
(
0
)