摘要: Each side s to its own position on the question and no agreement was reached.

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  Daniel Kunkle spent most of his time in graduate school playing with a colorful puzzle called a Rubik's Cube(魔方).He wasn't just goofing off.With clever computer programming, Kunkle figured out that any Rubik's Cube can be solved in 26 moves or fewer.

  ◆Cracking the cube

  Each side of a Rubik's Cube is divided into nine squares.When the puzzle is solved, all nine squares on each side are the same color as one another.Hinges(铰链)allow rows of squares to rotate.The squares of a Rubik's Cube can be arranged in about 43 quintillion(that's 43 with 18 zeros after it)possible ways.By hand, it can take a long time to find a solution.Even the world's fastest computer would need a long time to solve the problem.

  To save time, Kunkle and computer scientist Gene Cooperman of Northeastern University in Boston, Mass., looked for strategies to break the problem into smaller pieces.First, they calculated how many steps would be required to solve the puzzle using only half-turns, which send a square to the opposite side of the cube.Their study showed that only 600,000 possible configurations(结构)can be solved this way.Using a desktop computer, Kunkle discovered that all these arrangements could be solved in 13 moves or less.

  ◆Puzzle pieces

  Next, the researchers wanted to calculate how many steps would be necessary to turn any other configuration into one of the special 600,000 pre-solved arrangements.Results showed that it could be done in 16 moves or fewer.Remember that it took a maximum of 13 steps to solve one of these special configurations.In sum, the researchers concluded, any configuration could be solved in a maximum of 29 steps.

  Kunkle and Cooperman noticed, however, that only about 80 million configurations(far less than 1 percent of all possibilities)actually needed more than 26 steps to reach a solution.So, the pair focused on the few, hardest arrangements.This time, they searched through every possible way of solving each one in 26 steps and at the end they did it.The strategies that Kunkle and Cooperman used to solve the cube can be applied to other complicated problems, especially ones that require searching through lots of possibilities.Scheduling airplane flights to carry millions of people to a variety of destinations as quickly as possible is one example.

(1)

What does the passage mainly focus on?

[  ]

A.

What the best thinking strategy is.

B.

How a Rubik's Cube benefits us.

C.

How to play a Rubik's Cube.

D.

How Kunkle and Cooperman solved the cube.

(2)

In the second paragraph,“goofing off”means ________.

[  ]

A.

killing time

B.

enjoying his interest

C.

studying computer programming

D.

solving the puzzle

(3)

What strategy did Kunkle and Cooperman mainly use to solve the cube?

[  ]

A.

Thinking outside of the box.

B.

Dividing complicated problems into smaller pieces.

C.

Critical thinking.

D.

Focusing on finding new ideas and acting on them.

(4)

By half turns, how many possible configurations can be worked out?

[  ]

A.

43 quintillion.

B.

80 million.

C.

600 thousand.

D.

29 million.

(5)

With the example of“scheduling airplane flights”, the author intends to show us that ________.

[  ]

A.

scheduling airplane flights is a difficult task

B.

good arrangements can save a lot of time

C.

Kunkle and Cooperman also schedule airplane flights

D.

the strategies used to deal with the cube can be applied to other fields

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Every pet owner loves his pet. There is no argument here.
  But when we asked our readers whether they would clone (克隆, 复制)their beloved animals, the responses(反应) were split almost down the middle. Of the 228 readers who answered it, 108 would clone, 111 would not and nine weighed each side without offering an opinion.
  Clearly, from readers’ response, this is an issue that reaches deeply into both the joy and final sadness of owning a pet. It speaks, as well, to people’s widely differing expectations over the developing scientific procedure.
  Most of the respondents who favored the idea strongly believed it would produce at least a close copy of the original; many felt the process would actually return an exact copy. Those on the other side, however, held little hope a clone could never truly recreate a pet, many simply didn’t wish to go against the natural law of life and death.
  Both sides expressed equal love for their animals. More than a few respondents owned “the best dog/cat in the world”. They thought of their pets as their “best friend”, “a member of the family,”“the light of my life.” They told moving stories of pets’ heroism, intelligence and selfless devotion.
  Then the loss is so disturbing---and the cloning so attractive. “People become very close to their animals, and the loss can be just as hard to bear as when a friend or family member dies,” says Gary Kowalski, author of Goodbye, Friend: Healing Wisdom for Anyone Who Has Ever Lost a Pet. “For me, cloning feels like an attempt to turn death away…It’s understandable. Death is always painful. It’s difficult to deal with. It’s hard to accept.”
  But would cloning reduce the blow? This question seemed to be at the heart of this problem.
【小题1】So far as the cloning of pets is concerned, a recent survey shows that, of all pet owners, ____.

A.a lot more of them are for it
B.a lot more of them are against it
C.very few of them are willing to tell their opinions
D.about half of them are for it and the other half against it
【小题2】While talking about the respondents from the readers, the expression “final sadness of owning a pet” refers to ____.
A.the death of one’s pet
B.the high cost of owning a pet
C.the troubles one has to deal with in keeping a pet
D.the dangers about the cloning of a pet
【小题3】From what Gary Kowalski says, we can know that he ____.
A.has never thought about the problem of cloning
B.is going to write another book on pets
C.is in favor of the idea of cloning pets
D.is all against the cloning of pets
【小题4】What is the key question at the heart of the problem of cloning pets?
A.Can cloning make the pain one suffers less when a pet dies?
B.Can pet owners afford the cost of cloning?
C.Does cloning go against the law of nature?
D.How reliably does cloning produce an exact copy of one’s pet?

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Every pet owner loves his pet. There is no argument here.

  But when we asked our readers whether they would clone their beloved animals, the responses were split almost down the middle. Of the 228 readers who answered it, 108 would clone, 111 would not and nine weighed each side without offering an opinion.

  Clearly, from readers’ response, this is an issue that reaches deeply into both the joy and eventual sadness of owning a pet. It speaks, as well, to people’s widely differing expectations over the developing scientific procedure.

  Most of the respondents who favored the idea strongly believed it would produce at least a close copy of the original; many felt the process would actually return an exact copy. Those on the other side, however, held little hope a clone could never truly recreate a pet, many simply didn’t wish to go against the natural law of life and death.

  Both sides expressed equal love for their animals. More than a few respondents owned “the best dog/cat in the world”. They thought of their pets as their “best friend”, “a member of the family,” “the light of my life.” They told moving stories of pets’ heroism, intelligence and selfless devotion.

  Little wonders the loss is so disturbing—and the cloning so attractive. “People become very close to their animals, and the loss can be just as hard to bear as when a friend or family member dies,” says Gary Kowalski, author of Goodbye, Friend: Healing Wisdom for Anyone Who Has Ever Lost a Pet. “For me, cloning feels like an attempt to turn death away…It’s understandable. Death is always painful. It’s difficult to deal with. It’s hard to accept.”

  But would cloning reduce the blow? This question seemed to be at the heart of this problem.

1.So far as the cloning of pets is concerned, a recent survey shows that, of all pet owners, __________.

A. a lot more of them are for it

B. a lot more of them are against it

C. very few of them are willing to tell their opinions

D. about half of them are for it and the other half against it

2.While talking about the respondents from the readers, the expression “eventual sadness of owning a pet” refers to _________.

A. the death of one’s pet

B. the high cost of owning a pet

C. the troubles one has to deal with in keeping a pet

D. the dangers involved in the cloning of a pet

3. In spite of their differences on the problem of cloning, it seems that ________.

A. all pet owners try to go against the natural law of life and death

B. all pet owners love their pets very much

C. people who support cloning love their pets more

D. people who dislike cloning love their pets more

4.From what Gary Kowalski says, we can know that he _________.

A. has never thought about the problem of cloning

B. is going to write another book on pets

C. is in favor of the idea of cloning pets

D. is all against the cloning of pets

5.What is the key question at the heart of the problem of cloning pets?

A. Can pet owners afford the cost of cloning?

B. Can cloning make the pain one suffers less when a pet dies?

C. Does cloning go against the law of nature?

D. How reliably does cloning produce an exact copy of one’s pet?

 

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The appeal of advertising to buying motives can have both negative and positive effects. Consumers may be convinced to buy a product of poor quality or high price because of an advertisement. For example, some advertisers have appealed to people’s desire for better fuel economy for their cars by advertising automotive products that improve gasoline mileage. Some of the products work. Others are worthless and a waste of consumers’ money.
Sometimes advertising is intentionally misleading. A few years ago a brand of
bread was offered to dieters (节食者) with the message that there were fewer calories in every slice. It turned out that the bread was not dietetic (适合于节食的), but just regular bread. There were fewer calories because it was sliced very thin, but there were the same number of calories in every loaf.
  On the positive side, emotional appeals may respond to a consumer’s real concerns. Consider fire insurance. Fire insurance may be sold by appealing to fear of loss. But fear of loss is the real reason for fire insurance. The security of knowing that property is protected by insurance makes the purchase of fire insurance a worthwhile investment for most people. If consumers consider the quality of the insurance plans as well as the message in the ads, they will benefit from the advertising.
  Each consumer must evaluate her or his own situation. Are the benefits of the product important enough to justify buying it? Advertising is intended to appeal to consumers, but it does not force them to buy the product. Consumers still control the final buying decision.
56. Advertising can persuade the consumer to buy worthless products by _________.
  A. stressing their high quality
  B. convincing him of their low price
  C. maintaining a balance between quality and price
  D. appealing to his buying motives
57. The reason why the bread advertisement is misleading is that ________.
  A. thin slices of bread could contain more calories
  B. the loaf was cut into regular slices
  C. the bread was not genuine bread
  D. the total number of calories in the loaf remained the same
58. The passage tells us that _______.
  A. sometimes advertisements really sell what the consumer needs
  B. advertisements occasionally force consumers into buying things they don’t need
  C. the buying motives of consumers are controlled by advertisements
  D. fire insurance is seldom a worthwhile investment
59. It can be inferred from the passage that a smart consumer should ________.
  A. think carefully about the benefits described in the advertisements
  B. guard against the deceiving nature of advertisements
  C. be familiar with various advertising strategies
  D. avoid buying products that have strong emotional appeal
60. The passage is mainly about ________.
  A. how to make a wise buying decision
  B. ways to protect the interests of the consumer
  C. the positive and negative aspects of advertising
  D. the function of advertisements in promoting sales

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The appeal of advertising to buying motives can have both negative and positive effects. Consumers may be convinced to buy a product of poor quality or high price because of an advertisement. For example, some advertisers have appealed to people’s desire for better fuel economy for their cars by advertising automotive products that improve gasoline mileage. Some of the products work. Others are worthless and a waste of consumers’ money.

Sometimes advertising is intentionally misleading. A few years ago a brand of

bread was offered to dieters (节食者) with the message that there were fewer calories in every slice. It turned out that the bread was not dietetic (适合于节食的), but just regular bread. There were fewer calories because it was sliced very thin, but there were the same number of calories in every loaf.

  On the positive side, emotional appeals may respond to a consumer’s real concerns. Consider fire insurance. Fire insurance may be sold by appealing to fear of loss. But fear of loss is the real reason for fire insurance. The security of knowing that property is protected by insurance makes the purchase of fire insurance a worthwhile investment for most people. If consumers consider the quality of the insurance plans as well as the message in the ads, they will benefit from the advertising.

  Each consumer must evaluate her or his own situation. Are the benefits of the product important enough to justify buying it? Advertising is intended to appeal to consumers, but it does not force them to buy the product. Consumers still control the final buying decision.

56. Advertising can persuade the consumer to buy worthless products by _________.

  A. stressing their high quality

  B. convincing him of their low price

  C. maintaining a balance between quality and price

  D. appealing to his buying motives

57. The reason why the bread advertisement is misleading is that ________.

  A. thin slices of bread could contain more calories

  B. the loaf was cut into regular slices

  C. the bread was not genuine bread

  D. the total number of calories in the loaf remained the same

58. The passage tells us that _______.

  A. sometimes advertisements really sell what the consumer needs

  B. advertisements occasionally force consumers into buying things they don’t need

  C. the buying motives of consumers are controlled by advertisements

  D. fire insurance is seldom a worthwhile investment

59. It can be inferred from the passage that a smart consumer should ________.

  A. think carefully about the benefits described in the advertisements

  B. guard against the deceiving nature of advertisements

  C. be familiar with various advertising strategies

  D. avoid buying products that have strong emotional appeal

60. The passage is mainly about ________.

  A. how to make a wise buying decision

  B. ways to protect the interests of the consumer

  C. the positive and negative aspects of advertising

  D. the function of advertisements in promoting sales

 

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