A. Attention must be paid to environmental factors.
B. Principles of curing cancers.
C. It will take long to find perfect cures.
D. An important discovery in the research.
E. The causative factor of cancer is very clear.
F. The survival rate differs among patients with various cancers.
1.___________
“I have great confidence that by the end of the decade we’ll know in vast detail how cancer cells arise,” says microbiologist Robert Weinberg, an expert on cancer. “But,” he cautions, “some people have the idea that once one understands the causes, the cure will rapidly follow. Consider Pasteur. He discovered the causes of many kinds of infections, but it was fifty or sixty years before cures were available. ”
2.____________
This year, 50 percent of the 910,000 people who suffer from cancer will survive at least five years. In the year 2020, the National Cancer Institute estimates, that figure will be 75 percent. For some skin cancers, the five-year survival rate is as high as 90 percent. But other survival statistics are still discouraging—13 percent for lung cancer, and 2 percent for cancer of the pancreas (胰腺) .
3.___________
With as many as 120 varieties in existence, discovering how cancer works is not easy. The researchers made great progress in the early 1970s, when they discovered that oncogenes, which are cancer-causing genes, are inactive in normal cells. Anything from universe rays to radiation to diet may activate an inactive gene, but how remains unknown. If several oncogenes are driven into action, the cell, unable to turn them off, becomes cancerous.
4.____________
The exact process involved is still mysterious, but the likelihood that many cancers are initiated at the level of genes suggests that we will never prevent all cancers. “Changes are a normal part of the evolutionary process,” says oncologist William Hayward. Environmental factors can never be totally eliminated; as Hayward points out, “We can’t prepare a medicine against universe rays.”
5.____________
The prospects for cure, though still distant, are brighter. “First, we need to understand how the normal cell controls itself. Second, we have to determine whether there are a limited number of genes in cells, which are always responsible for at least part of the trouble. If we can understand how cancer works, we can reduce its action. ”
1.C
2.F
3.D
4.A
5.B
【解析】
试题分析:本文主要讲述了人类在癌症治疗方面的诸多信息,有癌症治疗的方法和原则,以及癌症治疗方面的研究的突破等。
1.C 根据本段最后一句He discovered the causes of many kinds of infections, but it was fifty or sixty years before cures were available. ”可知也会很多年以来才会找到治愈癌症的方法。故C正确。
2.F 根据本段最后2行For some skin cancers, the five-year survival rate is as high as 90 percent. But other survival statistics are still discouraging—13 percent for lung cancer, and 2 percent for cancer of the pancreas (胰腺) . 可知不同的癌症的存活率是不一样的。故F正确。
3.D 根据本段2,3,4行The researchers made great progress in the early 1970s, when they discovered that oncogenes, which are cancer-causing genes, are inactive in normal cells.可知本段是关于癌症治疗方面的一个重大发现。故D项符合上下文。
4.A 根据本段最后一句Environmental factors can never be totally eliminated; as Hayward points out, “We can’t prepare a medicine against universe rays.” 可知我们在研究癌症的时候,必须要把环境的因素考虑在内。故A正确。
5.B 根据本段中的First, ……Second….可知本段讲述的是治疗癌症要遵循的原则和方法。故B正确。
考点:考察健康类短文阅读
科目:高中英语 来源:广东省湛江市第二中学2009-2010学年度高二下学期高期中考试英语试卷 题型:完型填空
II. 完形填空(共15题,每小题2分,共30分)
American public education has changed in recent years. One change is that increasing numbers of American parents and teachers are starting independent public school 11 charter schools (特许学校).
In 1991, there were no charter schools in the United States. Today, more than2,300 charter schools 12 in 34 states and the District of Columbia. 575,000 students 13 these schools. The students are from 5 years of age through 18 or older.
A charter school is 14 by groups of parents, teachers and community (社区) members, It is similar in some ways 15 a traditional public school. It receives tax money to operate just as other public schools do. The 16 it receives depends on the number of students. The charter school must prove to local or state governments that its students are learning. These governments 17 the school with the agreement, or charter that permits it to operate.
Unlike a traditional public school, 18 the charter school does not have to obey most laws which govern public schools. Local, state or federal governments cannot tell it what to 19 .
Each school can choose its own goals and decide the ways it wants to 20 those goals. Class sizes usually are smaller than those in many traditional public schools. Many students and parents say 21 in charter schools may be more creative.
However, state education agencies, local education-governing committees and unions are often 22 charter schools. They say these schools may receive money badly 23 by traditional public schools. Experts say some charter schools are doing well while others are struggling.
Congress provided 200million dollars for 24 charter schools in the 2002 federal budget (预算). But often the schools say they lack enough money for their 25 .Many also lack needed space.
11. A. called B. asked C. known D. said
12. A. study B. organize C. operate D. perform
13. A. finish B. attend C. leave D. cut
14. A. taught B. held C. created D. understood
15. A. to B. with C. by D. in
16. A. attention B. amount C. expense D. information
17. A. buy B. review C. give D. provide
18. A. besides B. moreover C. thus D. however
19. A. teach B. discuss C. have D. get
20. A. set B. reach C. settle D. define
21. A. farmers B. workers C. teachers D. soldier
22. A. against B. for C. in D. with
23. A. treated B. needed C. earned D. wasted
24. A. needing B. spending C. comparing D. establishing
25. A. programs B. parents C. records D. words
查看答案和解析>>
科目:高中英语 来源:2010年高考英语试题分类汇编——说明文完形填空 题型:完型填空
完形填空(共20小题;每小题1.5分,满分30分)
阅读下面短文,从短文后各题所给的四册选项(A、B、C、D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
Most people give little thought to the pens they write with , especially since the printers in modern homes and offices mean that very 36things are handwritten .All too often,people buy a pen based only on 37,and wonder why they are not satisfied 38 ,they begin to use it ,However, buying a pen that you’ll enjoy is not 39 if you keep the following in wond.
First of all, a pen should fit comfortably in your hand and be 40 to use .The thickness of the pen is the most important characteristic(特征)41comfort. Having a small hand and thick fingers, you may 43 a fatter pen .The length of a pen can 44 influence comfort. A pen that is too 45 can easily feel top-heavy and unstable.
Then, the writing point of the pen should 46 the ink to flow evenly(均匀的) while that pen remains in touch with the paper 47 will make it possibly for you to creat a 48 line of writing .The point should also be sensitive enough to 49 ink from running when the pen is lifted.A point that does not block the 50 may leave drops of ink, 51 you pick the pen up and put it down again.
52 ,the pen should make a thick , dark line. Fine-line pens may 53 bad handwriting, but fine, delicate lines do not command 54 next to printed text ,as ,55, a singnature on a printed letter .A broader line, on the other hand ,gives an impression of confidence and authority (权威)。
36.A.many B.few C.pleasant D.important
37.A.looks B.reason C.value D.advantanges
38.A.once B.if C.because D.though
39.A.coveenient B.practocal C.strange D.difficult
40.A.heavy B.easy C. hard D.safe
41.A.taking B.finding C.determining D.seeking
42.A.strong B.weaker C.smaller D.larger
43.A.prefer B.recommend C.prepare D. demand
44.A.hardly B.also C. never D。 still
45.a.thick B.light C. rong D. soft
46.A.change B.allow C. reduce D .press
47. Athey B. one C. this D. some
48. A. from B. rough C. black D. smooth
49. A. prevent B. free C. protect D. remove
50. A. way B. sight C. flow D. stream
51. A. so B. as C. and D. yet
52. A. Meanwhile B. Generally C. Afterwards D. Finally
53. A. show up B. differ from C. break down D. compensate for
54. A. attention B. support C. respect D. admission
55. A. at most B. for example C. in brief D. on purpose
查看答案和解析>>
科目:高中英语 来源:2013-2014学年高考二轮复习训练:专题11 介词与介词短语英语试卷(解析版) 题型:完型填空
Most people give little thought to the pens they write with,especially since the printers in modern homes and offices mean that very ____things are handwritten.All too often,people buy a pen based only on ____,and wonder why they are not satisfied ___ they begin to use it.However,buying a pen that you’ll enjoy is not ____ if you keep the following in mind.
First of all,a pen should fit comfortably in your hand and be __5__ to use.The thickness of the pen is the most important characteristic(特征)____ comfort.Having a small hand and thick fingers,you may be comfortable with a thin pen.If you have a ____ hand and thicker fingers you may ____a fatter pen.The length of a pen can ____ influence comfort.A pen that is too ____ can easily feel top?heavy and unstable.
Then,the writing point of the pen should ____ the ink to flow evenly(均匀地) while the pen remains in touch with the paper.____ will make it possible for you to create a ____ line of writing.The point should also be sensitive enough to ____ink from running when the pen is lifted.A point that does not block the ____ may leave drops of ink,____ you pick the pen up and put it down again.
___,the pen should make a thick,dark line.Fine?line pens may ____ bad handwriting,but fine,delicate lines do not command ____ next to printed text,as,____,a signature on a printed letter.A broader line,on the other hand,gives an impression of confidence and authority(权威).
1.A.many? B.few
C.pleasant? D.important
2.A.looks? B.reason
C.value? D.advantages
3.A.once? B.if
C.because? D.though
4.A.convenient? B.practical
C.strange? D.difficult
5.A.heavy? B.easy
C.hard? D.safe
6.A.taking? B.finding
C.determining? D.seeking
7.A.stronger? B.weaker
C.smaller? D.larger
8.A.prefer? B.recommend
C.prepare? D.demand
9.A.hardly? B.also
C.never? D.still
10.A.thick? B.light
C.long? D.soft
11..A.change? B.allow
C.reduce? D.press
12.A.They? B.One
C.This? D.Some
13.A.thin? B.rough
C.black? D.smooth
14.A.prevent? B.free
C.protect? D.remove
15.A.way? B.sight
C.flow? D.stream
16..A.so? B.as
C.and D.yet
17.A.Meanwhile? B.Generally
C.Afterwards? D.Finally
18.A.show up? B.differ from
C.break down D.compensate for
19.A.attention? B.support
C.respect? D.admission
20.A.at most? B.for example
C.in brief? D.on purpose
查看答案和解析>>
科目:高中英语 来源:湖南省湘潭地区2009-2010学年度高一下学期期末联考试题(英语) 题型:完型填空
第二节完形填空(共20小题;每小题1分,满分20分)
Once there was a woman whose only son had died. In her sorrow she went to ask a wise man whether there was a way to bring her son back to 36 . "Bring me a mustard seed (芥菜籽) from a home that has never known 37 . I will use it to help you," he said to her, 38 sending her away or trying to persuade her that there was hope. At once she 39 to look for that mustard seed. The first 40 she came to was a huge building. Knocking on the door, she said, "I’m 41 a house that has never known suffering. Is this the place? It’s very 42 to me." "You have come to the 43 place," they told her, and began to 44 out all the sad things that had happened to 45 ."Who is better able to 46 the misfortune (不幸) these poor people have suffered than I, who have 47 sadness?" she thought. 48 she stayed there and comforted them 49 setting off again to look for a house that had never known sorrow. The woman went on, full of 50 , and came across a51 on the road. She asked the farmer the same question, but 52 he too said no. Wherever she went, from huts (茅屋) to palaces, there was no one without tales of 53 and misfortune. She came to be so 54 listening to other people’s sad stories that she 55 about looking for the mustard seed. Listening to the sorrow of others had driven the sorrow from her own heart.
36. A. attention B. truth C. health D. life
37. A. happiness B. sorrow C. value D. wealth
38. A. for fear of B. because of C. in spite of D. instead of
39. A. set off B. took off C. put off D. went off
40. A. expression B. memory C. place D. chance
41. A. caring for B. looking for C. paying for D. leaving for
42. A. important B. strange C. fair D. common
43. A. different B. right C. wrong D. certain
44. A. turn B. pour C. carry D. work
45. A. it B. them C. him D. her
46. A. preserve B. describe C. share D. accept
47. A. experienced B. treated C. controlled D. connected
48. A. However B. While C. Though D. So
49. A. unless B. after C. before D. until
50. A. hope B. pleasure C. regret D. fear
51. A. factory B. palace C. sign D. hut
52. A. hopefully B. strangely C. originally D. Unfortunately
53. A. happiness B. endings C. sadness D. promises
54. A. disappointed B. busy C. happy D. Free
55. A. forgot B. cared C. worried D. found
查看答案和解析>>
科目:高中英语 来源:河北省2009---2010学年度高二下学期第二次月考英语试题 题型:单项填空
. Niagara Falls is a great tourist________, drawing millions of visitors every year.
A. attention B. attraction C. avenue D. altitude
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com