题目内容
2.Scientists investigated why Ebola virus is so deadly when it spreads from animals to humans and then from human-to-human contact.The research team looked at the Zaire Ebola virus in an animal system to understand how it gains strength.This virus is responsible for the current outbreak in West Africa.They found that initially the animal systems were not affected by the virus,but succeeding transmission(传送) into other animals caused the virus to"hot up"and become more severe.The team analyzed the viruses at different stages and were able to identify several changes in its genetic material that were associated with increased disease.
Professor Julian Hiscox,who led the study from the University's Institute of Infection and Global Health,explains:"The work tells us that the evolutionary goal of Ebola virus is to become more fatal."
"We were able to show through genetic analysis which parts of the virus are involved in this process.The information we have gathered will now allow us to monitor for such changes in an outbreak as well as develop future treatment strategies."
Professor Roger Hewson,leading the study from Public Health England,Porton Down,said:"Ebola virus is such a destructive infection to the people affected by the disease and the economy of West Africa."
"Our understanding of Ebola virus biology is way behind that of other viruses and our cooperation shows how we can bring together our specialists'skills to close this knowledge gap."
Professor Miles Carroll,a co-author of the work,said:"This study has allowed the team to be at the forefront of developing methodologies to analyze patient samples recently taken by the European Mobile Laboratory from West Africa to understand disease evolution during the current outbreak."
29.What does the first paragraph mainly tell us?C
A.How severe Ebola virus is.
B.How Ebola virus spreads.
C.How Ebola virus gradually becomes deadly.
D.What contributions scientists have made on Ebola virus.
30.Which of the following statements is mentioned in the passage?B
A.In the first stage,the virus hurts its victims much.
B.As the virus spreads,it'll change and become more and more deadly.
C.The research in Ebola virus is more advanced than that in other viruses.
D.The scientists have a negative attitude to the research in Ebola virus.
31.The underlined word"fatal"has the closest meaning toB.
A.optimistic B.deadly C.common D.fantastic
32.Where can we probably read this passage?A
A.In a science report.
B.In a storybook.
C.In an advertisement.
D.In a textbook.
分析 本文属于说明文阅读,作者通过这篇文章向我们介绍了埃博拉病毒,它开始时并不是致命的,而是在传播过程中发生了改变,变得越来越致命,如今科学家还没有发现能治愈埃博拉的方法.
解答 29.C 细节理解题,根据第一段Scientists investigated why Ebola virus is so deadly when it spreads from animals to humans and then from human-to-human contact.可知本段讲述了埃博拉病毒如何逐渐成为致命的病毒,故选C.
30.B 推理判断题,根据第一段They found that initially the animal systems were not affected by the virus,but succeeding transmission(传送) into other animals caused the virus to"hot up"and become more severe.可知最初埃博拉不是致命的,随着它的传播导致它变得越来越致命,故选B.
31.B 词义猜测题,根据第三段Professor Julian Hiscox,who led the study from the University's Institute of Infection and Global Health,explains:"The work tells us that the evolutionary goal of Ebola virus is to become more fatal."可知Julian Hiscox教授告诉我们埃博拉病毒进化的目标是更致命的,故选B.
32.A 文章出处题,通读全文可知本文是有关埃博拉病毒的科学报道,故选A.
点评 考查学生的细节理解和推理判断能力.做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确选择.在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
-OK,I will.( )
A. | it | B. | me | C. | this | D. | one |
A. | draw | B. | strike | C. | rush | D. | push |