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提问人：网友fishlin99
发布时间：2022-01-06
[主观题]
The sum of n different positive integers is less than 100. What is the greatest possible v
alue of n？
A．10
B．11
C．12
D．13
E．14
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更多“The sum of n different positive integers is less than 100. What is the greatest possible v”相关的问题
第1题
Although Homer did not come from the South, according to the classification criteria of social classes in the South, he belonged to the poor white lower class, because he had no land and was paid by working hours daily.
第2题
In which of the following phases of software development is it the cheapest to fix a fault? _______ 在软件开发的以下哪个阶段解决故障最廉价？ _______
A、The integration phase
B、The design phase
C、The implementation phase
D、The maintenance phase
第3题
You __________ pay the money, but you __________ do so at once.
A、needn’t… must
B、need… need
C、must … must
D、must… needn’t
第4题
As a medium of exchange, money permits the separation of exchange into the two distinct acts of buying and selling. Hence producers who know they will be paid in money, can concentrate on finding the most suitable outlet for their goods, while buyers who will pay in money, can concentrate on finding the cheapest market for the wings they wish to purchase.
Specialization is encouraged, because people whose output is not a complete product but only a part of one can be paid an amount equivalent to their share of the product.
Another advantage of money is that it is a measure of value. In a barter economy it would be necessary to determine how many plates were worth one hundred weight of cotton, or how many pens should be exchanged for a ton of coal.
The process of establishing relative values would have to be undertaken for every act of exchange, according to what products were being offered against one another, and according to the two parties’ desires and preferences.
Thirdly, money acts as store of wealth. It is difficult to imagine saving under a barter system. No one engaged on only one stage in the manufacture of a product could save part of his output, since he would be producing nothing complete. Most products deteriorate fairly rapidly, either physically or in value, as a result of long storage; even if storage were possible, the practice of storing products for years on end would involve obvious disadvantages. If wealth could not be saved, or only with great difficulty, future needs could not be provided.
Using money as a medium of exchange means that_____.
A.you have to sell something in order to buy something
B.you have to buy something in order to sell something
C.you don’t have to buy something in order to sell something
D.the seller and the purchaser are the same person
Specialization is encouraged because_______.A.people can use their money to buy whatever they want
B.people get paid according to their share of the product.
C.people pay great attention to the manufacture of a product
D.people cannot use their money to buy whatever they want
A barter economy is one in which _______.A.value is decided by weight
B.value is decided by number
C.money is used and goods are not exchanged
D.goods are exchanged and money is not used
If one had to save products instead of money, __________.A.this would need years of practice
B.coal, for example, would lose its value
C.they could not be stored for years on end
D.many products would lose their value
How many advantages of money are mentioned in this passage？A.Two
B.Three
C.Four
D.Five
第6题
⑴ All substances will permit the passage of some electric current, provided the potential difference in high enough. ⑵ Television is the transmission and reception of images of moving objects by radio waves. ⑶ The rusting of metals is accompanied by increase in weight and by absorption of material from air. ⑷ Its transmission over a long distance causes some loss of energy. From the above sentences, which features of EST text can you know in the following answers?
A、Extensive use of passive voice
B、Tendency towards nominalization
C、Post-position of Attributives
D、Use of the simple past and present tense
第7题
Which of the following is most close to the meaning of “I don’t have a stable job. I often work as a waiter at the restaurant at night “?
A、I take a part-time job as a waiter during the night
B、I take a part-time job as a waiter during the day
C、I take a full-time job as a waiter.
D、I hate my job of being a waiter at the restaurant at night.
第8题
For centuries, in the countries of south and Southeast Asia the elephant has been an intimate part of the culture, economy and religion, and nowhere more so than in Thailand. Unlike its African cousin, the Asian elephant is easily domesticated (驯化). The rare so-called white elephants have actually lent the authority of kingship to its rulers and until the 1920s the national flag was a white elephant on a red background.To the early Western visitors the country’s romantic name was “Land of the White Elephant”.
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Today, however, the story is very different. Out of work and out of land, the Thai elephant struggles for survival in a nation that no longer needs it. The elephant has found itself more or less abandoned by previous owners who have moved on to a different economic world and a westernized society. And while the elephant’s problems began many years ago, now it rates a very low national priority.
How this reversal from national icon (圣像) to neglected animal came about is a tale of worsening environmental and the changing lives of the Thais themselves. According to Richard Lair, Thailand’s experts on the Asian elephant and author of the report Gone Astray, at the turn of the century there may well have beenas many as 100,000 domestic elephants in the country. In the north of Thailand alone it was estimated that more than 20,000 elephants were employed in transport, 1,000 of them alone on the road between the cities of Chiang Mai and Chiang Saen. This was at a time when 90 per cent of Thailand was still forest—a habitat (栖息地) that not only supported the animals but also made them necessary to carry goods and people. Nothing ploughs through dense forest better than a massive but sure-footed elephant.
By 1950 the elephant population had dropped to a still substantial 13,397, but today there are probably nomore than 3,800, with another 1,350 roaming free in the national parks. But now, Thailand’s forest coversonly 20 per cent of the land. This deforestation (采伐森林) is the central point of the elephant’s difficult situation, for it has effectively put the animals out of work. This century, as the road network grew, so the elephant’s role as a beast of burden declined.
Choose correct answers to the question: What can we know about African elephants from the passage?
A.It is easy to tame them.
B.It is hard to tame them.
C.They are living a better life than Asian elephants.
D.Their fate is quite similar to that of Asian elephants.
Thailand was once called “Land of the White Elephant” because_______.A.white elephant is rarely seen and thus very special
B.white elephant was a national symbol until the 1920s
C.white elephant has helped kings to gain the ruling authority
D.this name was so romantic that it was popular among visitors
Why is the Thai elephant “out of work”, according to the author?A.Because the elephants are no longer useful to their owners.
B.Because their owners are westernized and neglect them.
C.Because the government pays little attention to the problem.
D.Because there are too many elephants and too few jobs.
Which of the following statements is true about the elephant population at various times?A.There were 100,000 tamed elephants at the turn of the century.
B.20,000 elephants were employed in transport in Thailand at the turn of the century.
C.By 1950 the elephant population in Thailand has been quite small.
D.Today the elephant population is estimated at 5,150.
The passage is most probably from_______.A.a travel magazine
B.a history book
C.a research report
D.an official announcement
请帮忙给出每个问题的正确答案和分析，谢谢！
第10题
Section A （每题2分，共20分） Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once. After each question there will be a pause. During the pause you must read the four choices marked A), B), C), and D), and decide which one is the best answer. Then write down the corresponding letter on the Answer Sheet. 期末听力
A、Stay at home.
B、Watch TV.
C、See a film.
D、Go out.
