题目
题型：不详难度：来源：
DNA ( Deoxyribonucleic acid ) is one of the most important discoveries in science. DNA is the plan for the human being , as a blueprint is the plan for building. DNA makes a person look the way he does. A person"s DNA. comes from a mixing of his parents" DNA. That"s why a child looks like his parents. But, besides controlling things such as height and hair color, DNA can also give people diseases , Scientists are now studying DNA to cure diseases.
In the seventies, scientists developed a process called recombinant (重新组合) or RDNA. Although it sounds difficult to understand, RDNA simply means taking DNA from one animal or plant and putting it into another. By doing so, scientists can create new beings. In so doing, scientists can better understand DNA, especially what parts of DNA do . After they understand DNA, scientists can begin to cure diseases. Often, the new being created will itself be the cure.
Besides curing diseases, RDNA research can also do other things. For example, scientists in Japan have already created “super-trees”. Trees help humans, because they take CO2, which poisons humans, from the air and turns it into oxygen, which lets humans breathe. “Super-trees” do this too, but do if much faster. As things such as cars and factories have already put much CO2 in the area, “super-trees” are badly needed.
Unfortunately, there is serious danger in RDNA research. Scientists want to create animals to cure old diseases, but these new animals may also create new diseases. It will be a serious problem if the animals escape from the science laboratory and into nature. As these animals are not natural, they may let loose many new powerful diseases.
As a result, RDNA research will create many solutions (解决方案), but it will also create many problems.
67. From the passage, we can know that a boy looks like his parents because________
A. he is son of his parents
B. his parents" DNA decides his appearance
C. he has received DNA from his father or his mother
D. scientists have put some of his parents" DNA into him
68. What does the underlined expression “let loose” probably mean?
A. let... go free B. get rid of C. absorb D. survive
69. What is the best title for the passage?
A. The DNA Research in Japan
B. A New Way of DNA Research in Japan
C. The Causes and Effects of DNA Research
D. The Advantages And Disadvantages of RDNA
70. The following statements are true about RDNA research EXCEPT_____.
A. the research has been stopped because the created animals carry virus
B. “super-trees” might be widely planted around the world
C. scientists have not completely understood DNA
D. RDNA research will benefit human beings a lot
答案
解析
67 B见第一段第三句话。
68 A let loose 意为“释放”let go free 。
69 D 纵观全文及文章最后一句话。
70 A 此项在文章中没有提及。
核心考点
试题【DNA ( Deoxyribonucleic acid ) is one of the most important discoveries in scienc】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
They would stand there, silently, 3 to complete the task. Mary couldn’t figure it out. 4 she had studied in her educational curriculum helped, and she 5 hadn’t seen anything like it in her student-teaching days back in Phoenix.
What am I doing wrong? Could I have chosen five students who can’t do the 6 ? Mary would wonder. No, 7 couldn’t be that. Finally she 8 the students what was wrong. And in their answers, she learned a 9 lesson from her young 10 pupils about self-image and a(n) 11 of self-worth.
It seemed that the students 12 each other’s individuality and knew that 13 of them were capable of doing the problems. 14 at their early age, they understood the senselessness of the win-lose approach in the classroom. They believed no one would 15 if any students were shown up or embarrassed at the 16 . So they 17 to compete with each other in public.
Once she understood, Mary changed the system 18 she could check each child’s math problem individually, but not at any child’s expense 19 his classmates. They all wanted to learn, 20 not at someone else’s expense.
1. A. go to B. come to C. get close to D. bring
2. A. his B. their C. his own D. her
3. A. happy B. willingly C. readily D. unwilling
4. A. Anything B. Nothing C. Everything D. Neither
5. A. almost B. certainly C. hardly D. never
6. A. question B. chalkboard C. problem D. homework
7. A. they B. it C. everything D. each
8. A. asked B. questioned C. told D. understood
9. A. outstanding B. surprising C. annoying D. frightening
10. A. sunburned B. tender C. Indian D. naughty
11. A. sense B. image C. way D. aspect
12. A. had B. ignored C. respected D. cared
13. A. none B. no one C. each D. not all
14. A. Especially B. Even though C. Even so D. Even
15. A. lose B. win C. achieve D. answer
16. A. time B. situation C. chalkboard D. condition
17. A. refused B. rejected C. tried D. promised
18. A. if B. so that C. unless D. in case
19. A. in favour of B. of C. by means of D. in front of
20. A. and B. but C. so D. or
US president Barack Obama told students that it takes hard work in school to prepare for a rewarding career in his “back to school” speech, 36 last Tuesday in Virginia, US. Here is excerpt （节选）from his speech:
I know that sometimes, you get the 37 that you can be rich and successful without any hard work – 38 your ticket to success is through rapping or basketball or being a reality TV star, when chances are, you’re not going to be any of those things. But the truth is, being successful is 39 .You won’t love every subject you study. Not every homework assignment will seem completely important to your life right this minute. And you may not succeed at 40 the first time you try.
That’s OK. Some of the most successful people in the world are the ones who’ve had the most 41 .JK Rowling’s first Harry Potter book was 42 12 times before it was finally published. Michael Jordan was 43 his high school basketball team, and he lost hundreds of games and missed thousands of shots during his career. But he once said. “I have failed over and over and over again in my life. And that is why I succeed.”
These people succeeded because they understand that you can’t let your failures 44 you. No one’s 45 being good at things; you become good at things through hard work.
Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness; it’s a sign of 46 . It shows you have the courage to admit when you don’t know something, and to learn something new.
And even when you’re 47 , even when you’re discouraged, and when you feel like other people have given up on yourself, you won’t give up on yourself. Because when you give up on yourself, you give up on your country.
36. A. addressed B. claimed C. delivered D. announced
37.A. feelings B. definition C. concept D. sense
38. A. that B. which C. what D. whatever
39. A. inaccessible B. hard C. rough D. unavailable
40.A, anything B. everything C. nothing D. something
41. A. effort B. attempts C. failures D. successes
42. A. denied B. turned away C. declined D. rejected
43. A. cut from B. cut off C. cut down D. cut in
44. A. confirm B. define C. identify D. prove
45. A. brought up B. raised C. fed D. born
46. A. strength B. courage C. weakness D. perseverance
47. A. struggling B. fighting C. trying D. succeeding
The shoes — named Square Eyes — contain an electronic pressure sensor and a tiny computer chip to record how many steps the wearer has taken in a day. A wireless transmitter(传话器) passes the information to a receiver connected to a television, and this decides how much evening viewing time the wearer deserves, based on the day’s efforts.
The design was inspired by a desire to fight against the rapidly ballooning waistlines among British teenagers, says Gillian Swan, who developed Square Eyes as a final year design project at Brunel University to London, UK. “We looked at current issues and childhood overweight really stood out,” she says. “And I wanted to tackle that with my design.”
Once a child has used up their daily allowance gained through exercise, the television automatically switches off. And further time in front of the TV can only be earned through more steps.
Swan calculated how exercise should translate to television time using the recommended daily amounts of both. Health experts suggest that a child take 12,000 steps each day and watch no more than two hours of television. So, every 100 steps recorded by the Square Eyes shoes equals precisely one minute of TV time.
Existing pedometers （计步器） normally clip onto a belt or slip into a pocket and keep count of steps by measuring sudden movement. Swan says these can be easily tricked into recording steps through shaking. But her shoe has been built to be harder for lazy teenagers to cheat. “It is possible, but it would be a lot of effort,” she says. “That was one of my main design considerations.”
小题1:According to Swan, the purpose of her design project is to ________.
| A．keep a record of the steps of the wearer |
| B．deal with overweight among teenagers |
| C．enable children to resist the temptation of TV |
| D．prevent children from being tricked by TV programs |
| A．They regulate a child’s evening TV viewing time. |
| B．They determine a child’s daily pocket money. |
| C．They have raised the hot issue of overweight. |
| D．They contain information of the receiver. |
| A．The exact number of steps to be taken. |
| B．The precise number of hours spent on TV. |
| C．The proper amount of daily exercise and TV time. |
| D．The way of changing steps into TV watching time. |
| A．makes it difficult for lazy teenagers to cheat |
| B．counts the wearer’s steps through shaking |
| C．records the sudden movement of the wearer |
| D．sends teenagers’ health data to the receiver |
| A．Smart Shoes Decide on Television Time |
| B．Smart Shoes Guarantee More Exercise |
| C．Smart Shoes Measure Time of Exercise |
| D．Smart Shoes Stop Childhood Overweight |
My sister-in-law teaches physically and mentally handicapped children at a private school in B
rooklyn. She recently 21 a Special Olympics and went to the starting line of the 100-metre dash with six 22 contestants. As the starting whistle sounded, a boy tripped, fell and began to cry. All the other 23 stopped, turned and went back to help. Then they all 24 hands and went on to the finish line together. Needless to say, everyone in the stands 25 .
Why am I so moved? There are tears of joy 26 with tears of sadness. Tears of joy, just for the 27 friendship, selflessness and love embodied (体现) by these children. Tears of sadness, just for how 28 from such behavior we adults have wandered. Wouldn’t it be nice if, at least once in a while, we could pause in our race for money and power; turn around to see the 29 of those we have left behind; go back and 30 these less able ones to their feet; and then walk forward together with them, arm in arm. | 小题1: |
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A full moon 3 on December 2. It will appear again on Thursday in time for the New Year"s countdown.
"If you"re in Times Square, you"ll see the 4 moon right above you. It"s going to be that brilliant," said Jack Horkheimer, director emeritus of the Miami Space Transit Planetarium and host of a weekly astronomy TV show.
The New Year"s Eve blue moon will be 5 in the United States, Canada, Europe, South America and Africa. For partygoers in Australia and Asia, the full moon does not show up 6 New Year"s Day, making January a blue moon month for them.
However, the Eastern Hemisphere can celebrate with a partial lunar eclipse（月蚀） on New Year"s Eve when 7 of the moon enters the Earth"s shadow. The 8 will not be visible in the Americas.
A full moon occurs 9 29.5 days, and most years have 12. 10 , an extra full moon in a month - a blue moon - occurs every 2.5 years. The 11 time there was a lunar double take was in May 2007. New Year"s Eve blue moons are rarer, occurring every 19 years. The last time was in 1990; the next one won"t 12 again until 2028.
Blue moons have no astronomical 13 , said Greg Laughlin, an astronomer at the University of California, Santa Cruz.
"`Blue moon" is just a 14 in the same sense as a `hunter"s moon" or a `harvest moon,"" Laughlin said in an e-mail.
The popular definition of blue moon 15 after a writer for Sky & Telescope magazine in 1946 misunderstood the Maine Farmer"s Calendar and marked a blue moon as the second full moon in a month. In fact, the calendar 16 a blue moon as the third full moon in a season with four full moons, not the usual three.
Though Sky & Telescope corrected the 17 decades later, the definition caught on. For purists（语言纯正癖者）, however, this New Year"s Eve full moon doesn"t even qualify as a 18 moon. It"s just the first full moon of the winter season.
In a tongue-in-cheek essay 19 on the magazine"s Web site this week, senior contributing editor Kelly Beatty wrote: "If skies are clear when I"m 20 celebrating, I"ll take a peek（眯着眼睛看） at that brilliant orb（天体） as it rises over the Boston skyline to see if it"s an icy shade of blue. Or maybe I"ll just howl."
( ) 1. A. wish B. wait C. hope D. expect
( ) 2. A. deal with B. do with C. develop with D. form into
( ) 3. A. occurred B. came C. ran D. went
( ) 4. A. full B. half C. bright D. part
( ) 5. A. out of sight B. visible C. big D. clear
( ) 6. A. until B. when C. before D. since
( ) 7. A. part B. all C. any D. none
( ) 8. A. moon B. eclipse C. sun D. shadow
( ) 9. A. each B. every C. either D. all
( ) 10. A. On the whole B. Generally speaking C. On average D. In addition
( ) 11. A. last B. next C. other D. another
( ) 12. A. go B. see C. come D. look
( ) 13. A. point B. evident C. theory D. significance
( ) 14. A. name B. object C. phenomenon D. tradition
( ) 15. A. created B. came about C. made D. copied
( ) 16. A. named B. called C. introduced D. defined
( ) 17. A. error B. name C. reality D. number
( ) 18. A. blue B. red C. yellow D. grey
( ) 19. A. published B. posted C. printed D. written
( ) 20. A. in B. out C. away D. on
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