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• 第1题：

  Questions 25 to 29 are based on the following passage.
  Prices determine how resources are to be useD、They are also the means by which products and services that are in limited supply are rationed among buyers. The price system of the United States is a very complex network composed of the prices of all the products bought and sold in the economy as well as those of a myriad of services, including labor, professional, transportation, and public-utility services. The interrelationship

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• 第2题：

  Questions 15 to 19 are based on the following passage.
  The biggest safety threat facing airlines today may not be a terrorist with a gun , but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, r

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• 第3题：

  Questions 20 to 24 are based on the following passage.
  Shyness is the cause of much unhappiness "for a great many people. Shy people are anxious and self-conscious; that is, they are excessively concerned with their own appearance and actions. Worrisome thoughts are constantly occurring in their minds: What kind of impression am 1 makingDo they like meDo I sound stupidAm I wearing unattractive clothes
  It is obvious that such uncomfortable feelings must affect people adversely.

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• 第4题：

  Questions 15 to 19 are based on the following passage.
  The biggest safety threat facing airlines today may not be a terrorist with a gun , but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, r

  答案解析与讨论：点击查看