首页
登录
职称英语
Could a plant virus have found a way to infect humans? It has always been as
Could a plant virus have found a way to infect humans? It has always been as
游客
2023-07-03
70
管理
问题
Could a plant virus have found a way to infect humans? It has always been assumed that plant viruses cannot infect animals, and vice versa, but plant viruses are known to be【C1】______in human faeces(粪便).
Now Didier Raoult at the University of the Mediterranean in Marseille, France, and his team think a pepper virus is making people【C2】______, too. They have found RNA from the pepper mild mottle virus in the faeces of 7 percent of the 304 adults they tested. Those with the virus were more【C3】______to report fever, abdominal pain and itching(痒)than those without it, his team found.
Not everyone is convinced, however. Because Raoult looked at many possible【C4】______, he would be expected to find a few that randomly【C5】______more common in virus-positive people, says Robert Garry, a virologist at Tulane University in New Orleans, Louisiana. Moreover, in order to enter a cell and replicate, a virus must bind to a receptor on its surface, and a plant virus would be highly unlikely to【C6】______a receptor on a human cell, says Garry.
One possibility, Raoult says, is that the virus does not infect human cells【C7】______. Instead, the naked viral RNA may alter the【C8】______of the cells through a mechanism similar to RNA interference, in which the presence of certain RNA sequences can【C9】______genes on and off. Raoult’s team is now working to【C10】______more direct evidence that the virus does infect humans.
A)abundant F)function K)situations
B)appear G)gather L)surprisingly
C)available H)likely M)symptoms
D)capacity I)recognise N)tested
E)directly J)sick O)turn [br] 【C7】
选项
答案
E
解析
副词辨析题。空格在infect human cells的后面,且本句不缺少基本的句子成分,因此应填副词修饰动词infect。根据句意可知,植物病毒可能并不______感染人体细胞,这里是对上段中提出的质疑的辩驳,结合选项来看directly“直接地”符合句意,故为答案。
转载请注明原文地址:http://tihaiku.com/zcyy/2805605.html
相关试题推荐
[originaltext]Problemsarealwaysencounteredinone’slifetobefacedand
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagai
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagai
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagai
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagai
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagai
Urbanlifehasalwaysinvolvedabalancingofopportunitiesandrewardsagai
[originaltext]Mathewlivedinabigcity,andalwayshadhishaircutbyth
[originaltext]Mathewlivedinabigcity,andalwayshadhishaircutbyth
Coca-Colahasalwaysbeenmorefocusedonitseconomicbottomlinethanong
随机试题
Ascorchingsun,anendlessseaofsandandawaterless,forbiddinglylonely
Hiscolourisnotrelevant______whetherheisagoodlawyer.A、ofB、forC、toD、
[originaltext]W:Oh,here’sapieceofcakeandasmallcoffeeforyou,sir.Th
__________(只有当新的淘金人潮进入这片区域后)didgoldlandbecometroublingscarce.Onlyaftern
[originaltext]I’msorrytohavetakenyourbagbymistake.[/originaltext][audi
Theeurozone,whichhasadoptedtheeuroasitssolelegalcurrency,isnow
2006年5月10日,甲公司向乙公司发出要约,要约中说明乙公司在5月16日前答复
阅读关于“人口增长模式”的图文资料,按要求完成教学设计任务。 材料一《普通高
Thechangeinthatvillagewasmiraculou
下列做法符合我国法律规定的是: A某公立大学以其教学大楼产权作抵押向银行申请贷
最新回复
(
0
)