题目内容
14．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 短文叙述了埃博拉病毒的发展情况以及科学家对它的致命性所展开的研究调查．
解答 29．C．主旨大意题．根据第一段"Scientists investigated why Ebola virus is so deadly"可知，本段第一句就是中心句，叙述了埃博拉病毒是怎样成为致命的病毒，故选C．30．B．事实细节题．根据第二段"succeeding transmission（传送） into other animals caused the virus to"hot up"and become more severe．"可知，病毒在动物之间传播的过程中越来越致命．故选B．
31．B．词义猜测题．根据第二段"but succeeding transmission（传送） into other animals caused the virus to"hot up"and become more severe"可推知，病毒是致命的．故选B．
32．A．推理判断题．短文叙述了埃博拉病毒的发展情况．因此可推知是出现在科学报道中，故选A．
点评 科教类阅读难度比一般阅读较大，它存在的生词比较多，因此考生应当综合略读、跳读和查读，猜词等阅读技巧来做题，平时也应加强练习．
练习册系列答案
相关题目