Question

【題目】根據(jù)短文內(nèi)容，選擇最佳答案。
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(傳送) 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.”
（1）What does the first paragraph mainly tell us?
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.
（2）Which of the following statements is mentioned in the passage?
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.
（3）The underlined word “fatal” has the closest meaning to ______.
A.optimistic
B.deadly
C.common
D.fantastic
（4）Where can we probably read this passage?
A.In a science report.
B.In a storybook.
C.In an advertisement.
D.In a textbook.

Answer 1

【答案】
（1）C
（2）B
（3）B
（4）A
【解析】文章講述了科學(xué)家對(duì)埃博拉病毒的研究結(jié)果已經(jīng)不同的科學(xué)家對(duì)該病毒的不同態(tài)度。
（1）段落大意。由文章第一段內(nèi)容可知，科學(xué)家通過調(diào)查，解釋了為什么埃博拉病毒是致命的，且在動(dòng)物與人群中，人群和人群間傳播的如此之快。說明了病毒傳播的范圍逐漸擴(kuò)大，危害性逐步加深，故選C。
（2）細(xì)節(jié)理解。由文章第二段The team analyzed the viruses at different stages... disease.可知，研究小組得出埃博拉病毒發(fā)展存在于不同階段。及文章第五段...Ebola virus is such a destructive infection to the people affected by the disease and the economy of West Africa.可知，埃博拉病毒有較強(qiáng)的破壞性，嚴(yán)重影響了西非的經(jīng)濟(jì)。故可得知，隨著病毒的傳播，埃博拉病每時(shí)每刻逐漸變化，而且越來越嚴(yán)重，故選B。
（3）詞義猜測。由上下文可知，埃博拉病毒具有致命性的危害，由此并結(jié)合選項(xiàng)的詞義可知，只有deadly具有此意。optimistic意為“樂觀的”；deadly意為“致命的，致死的”；common意為“普通的，共有的”；fantastic意為“異想天開的”，故選B。
（4）推理判斷。文章主要圍繞埃博拉病毒進(jìn)行說明的，故可得知本文是一篇科普類說明文。因此，本文摘自于科學(xué)報(bào)告中。storybook意為“故事書”；advertisement意為“廣告”；textbook意為“教科書，課本”，故選A。