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如果有n个变量，使用边界值分析法会产生个测试用例。

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Read the following textbook passages. Then choosethe three inferences that are most logically based on the given facts in each passage.1George Washington’s honesty is a trait that has been well publicized. 2The famous story of how little George chopped down his father’s favorite cherry tree, then bravely admitted to the deed, has an honored place in American presidential history. 3The cherry tree story was first recorded in 1806 by Parson Mason Weems, a Maryland preacher and storyteller. 4Unfortunately, Parson Weems was none too honest himself, and it appears that he invented the story of George and the cherry tree. 5There is no record of the cherry tree incident anywhere until it appears in Weems’s book. 6The parson, it seems, thought it acceptable to teach the virtue of honesty through a made-up story. 7We can judge Weems’s own truthfulness by the fact that he describes himself in the book as “formerly rector of Mount Vernon Parish.” 8Such a parish never existed.

A. 1. The passage suggests that George Washington was not so honest afterall.
B. 2. We can conclude that Parson Weems knew George Washington well.
C. 3. Widely accepted stories about history are not necessarily true.
D. 4. Parson Weems wrote about a virtue he didn’t have himself.
E. 5. The author of this passage doubts that George Washington was a great leader and president.
F. 6. In his stories and sermons, Weems may well have told other falsestories.

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1The Chicago Tribune once wrote that Henry Ford, the founder of the Ford Motor Company, was an ignorant man.2Ford sued, challenging the paper to “prove it.”3During the trial, Ford was asked dozens of simple, general information questions: “When was the Civil War?” “Name the presidents of the United States,” and so on. 4Ford, who had little formal education, could answer very few. 5Finally, exasperated, he said, “I don’t know the answers to those questions, but I could find a man in five minutes who does. 6I use my brain to think, not store up a lot of useless facts.”

A. 1.Henry Ford was probably angered by the article in theChicagoTribune.
B. 2.Ford frequently sued people.
C. 3.TheTribunewon the case in court.
D. 4.Ford believed that knowing where to find a fact is good enough.
E. 5.Ford would have been even more successful in his career had he had.
F. 6.Ford believed that knowing how to think is more important thanknowing facts.

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1Most people would like to think that they choose their friends solely on the basis of personal characteristics. 2A classic study of a housing complex for married students at the Massachusetts Institute of Technology (MIT) suggests that proximity— nearness and availability—can be an important factor. 3Researchers asked couples to list their friends in the complex. 4They found that residents were far more likely to list the couple in the next apartment than one that lived two doors away, and more likely to visit with a couple two doors away than with one three or four doors away. 5A distance of thirty feet or a short elevator ride made the difference between friends and strangers! 6More recent studies have confirmed the importance of proximity. 7One possible explanation is that whenever people encounter strangers, they feel tense. 8The more they see a person, the more they come to think of that person as predictable and safe, and hence the more likely they are to strike up a conversation that leads to friendship. 9This would explain why the most popularcouples in the MIT housing complex were those who lived at the bottom of the stairs near the garbage cans that everyone used.

A. 1.Most people probably think their personal preferences determine whom they choose for friends.
B. 2.In fact, our personal preferences have no effect on who our friends are.
C. 3.A person who lives in a big country is more likely to have more friends than someone who lives in a small country
D. 4.Someone living in an apartment house is likely to have more friends than someone who lives on a farm.
E. 5.A garbage collector is likely to have more friends than a letter carrier.
F. 6.Someone who works in a busy office is likely to have more friends than someone who works at home.

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使用镜像功能后，不需要取消镜像。

A. 对
B. 错

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