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
2024-01-20
60
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 facces 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) recognize N) tested
E) directly J) sick O) turn [br] 【C9】
选项
答案
O
解析
动词辨析题。由空格前的情态动词can可知,空格所在分句缺少谓语,因此应填动词原形,且能与后面的on and off搭配。结合选项可知,turn“转动”符合题意,表示在此过程中,某些核糖核酸序列的出现能够打开和关闭基因,故为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3379957.html
相关试题推荐
[originaltext]Somediseasesareinfectious—likecoldsandfluButwhatabou
中国人民历来是勇于探索、勇于创造、勇于革命的。TheChinesepeoplehavealwaysbeencourageousinexplora
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
[originaltext]M:Hi,Susan.Youarelookingverysmarttoday.W:Ialwayslook
Sausagehasbeenapartofhumans’cookingsystemfor15,000years.Nobo
Sausagehasbeenapartofhumans’cookingsystemfor15,000years.Nobo
随机试题
TheFrancehaveputforwarda(propose)______forajointproject.proposal句意:法
女性,38岁,因卵巢肿物行手术治疗。术中探查发现左卵巢肿物25cm×20cm×1
D是由y2=x及y=x-2所围成的区域,则化为二次积分后的结果为:
Networkscanbeinterconnectedbydiffer
HTML代码<ahref=″url″>……</a>表示( )。A.创建一个超
胸片示左侧全胸呈均匀的致密增高阴影,与纵隔连成一片,患侧肋间隙变窄,气管纵隔移向
关于神经冲动能传入中枢神经系统引起牙痛有多种学说,较能解释一些临床急性牙髓炎症状
(2018年真题)下列各项中,应计入废品损失的有( )。A.可修复废品的修复费
关于法的效力层级的说法,正确的是( )。A.部门规章与地方法规之间对同一事项的
投资者投入的固定资产,按()作为其成本。A、按同类或类似固定资产的市场价格 B
最新回复
(
0
)