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(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."
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 本文屬于說明文閱讀,作者通過這篇文章向我們介紹了埃博拉病毒,它開始時(shí)并不是致命的,而是在傳播過程中發(fā)生了改變,變得越來越致命,如今科學(xué)家還沒有發(fā)現(xiàn)能治愈埃博拉的方法.

解答 29.C  細(xì)節(jié)理解題,根據(jù)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.可知本段講述了埃博拉病毒如何逐漸成為致命的病毒,故選C.
30.B  推理判斷題,根據(jù)第一段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.可知最初埃博拉不是致命的,隨著它的傳播導(dǎo)致它變得越來越致命,故選B.
31.B  詞義猜測題,根據(jù)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教授告訴我們埃博拉病毒進(jìn)化的目標(biāo)是更致命的,故選B.
32.A  文章出處題,通讀全文可知本文是有關(guān)埃博拉病毒的科學(xué)報(bào)道,故選A.

點(diǎn)評 考查學(xué)生的細(xì)節(jié)理解和推理判斷能力.做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句,和題干進(jìn)行比較,再做出正確選擇.在做推理判斷題時(shí)不要以個(gè)人的主觀想象代替文章的事實(shí),要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷.

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科目:高中英語 來源: 題型:選擇題

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科目:高中英語 來源: 題型:閱讀理解

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B.Science and Technology
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36.Parents in the United States tend to ask their childrenD.
A.to save food.
B.to wash the dishes.
C.not to eat too much     
D.not to waste food.
37.Why do American restaurants serve large portions?B
A.Because Americans have big bellies.
B.Because Americans associate quantity with value.
C Because Americans are good eaters.
D.Because Americans are greedy.
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A.The US government recommended the amount of food a restaurant gave to a customer.
B.Health experts persuaded restaurants to serve smaller portions.
C.The American waistline started to expand.
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D.TwentythreepercentAmericansearnlessthan25,000per year.
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11.What would you do to reduce the chance of dying of cancer?How far would you go if you had a 70to 90percent chance of contracting bowel--and your uncle,mother,father,and two of your brothers had died from it?
Lynne Fisher decided she would do almost anything.So,even though she showed no signs of cancer at all,F(xiàn)isher,51,a former mental health worker,agreed to undergo what might sound like a radical surgery:doctors removed nearly her whole colon(結(jié)腸) and rerouted her small intestine(腸) to perform the functions of her large intestine.
The side effects were horrific,she said.For a year,F(xiàn)isher struggled to control her bowel movements.She fought depression,and she hated her large scars and the 28staples that had been left in her body.Her Multiple Sclerosis returned.The woman she shared a hospital room with--who'd had a similar surgery--did not survive.
"When you're in it,it's like a dark tunnel,"she told ABC News in a long phone conversation about her medical history.
But then,one day,she realized the surgery had helped saved her life.And since then,she's never looked back.
"What's a year out of your life compared to dying?"  the 51-year-old said from her home in central England."I get to watch my dogs grow up,my children grow up,my grandchild,I get to see my cherry blossoms in the tree,I get to see the sun shining in the morning,I get to go on holiday--I get to see life."
Genes that cause breast cancer have been discussed widely for years.But less well known is Lynch syndrome,the gene mutation that Fisher and her much of her family inherited.
Roughly one in 370people has Lynch syndrome,according to Lynch Syndrome International,an organization dedicated to helping people with Lynch syndrome and those who treat them.It's unclear how many Americans choose to have the surgery that Fisher had:prophylactic subtotal colectomy,which doctors describe as a major surgery that,while elective,can often save lives.

36.Why did Lynne Fisher decide to remove nearly her whole colon?C
A.Because she has already had a cancer.
B.Because she thought the colon was useless.
C.Because she was afraid of dying of bowel cancer someday.
D.Because her doctor persuaded her to do that.
37.According to the passage,what is NOT true about the surgery undergone by Lynne Fisher?A
A.It is only a very simple and easy surgery.
B.It can bring about some terrible side effects.
C.It's possible for one to die of the surgery.
D.It takes one maybe a year to recover from the surgery.
38.What can we learn from the underlined sentence?C
A.Lynne Fisher really regretted what she had done.
B.Lynne Fisher thought it was not worth a year to have the surgery.
C.Compared to death,the suffering during the year was worthwhile.
D.Lynne Fisher spent a painful year in recovering from the surgery.
39.What can we learn from the last paragraph?A
A.About 0.27% people have Lynch syndrome now in America.
B.We can tell exactly how many people have had the surgery.
C.Lynch Syndrome International helps people with Lynch syndrome only.
D.People with Lynch syndrome will be forced to have the surgery.
40.The main purpose of the passage is toD.
A.persuade people with Lynch syndrome to have a surgery
B.introduce Lynne Fisher and the disease she developed
C.tell us something about the Lynch syndrome and its effect on our health
D.introduce Lynch syndrome to us and tell us that a surgery can save lives.

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科目:高中英語 來源: 題型:選擇題

12.Encourage your children to try new things,but try not to      them too hard.( 。
A.drawB.strikeC.rushD.push

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