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短文理解

听力原文： In the United States, even if you decide that you do not want to borrow in order to go on vacation, it is still a good idea for you to have several major credit cards. These provide positive identification when renting an automobile and can be used for the deposit. The credit card receipts will serve as an accurate record of all hotel, plane, train, and restaurant expenses. The use of credit cards avoids the necessity of carrying large amount of cash, purchasing large amounts of traveler's cheeks and keeping track of them, or attempting to use personal checks in places other than your own locality.

Many major credit cards provide an instant cash service in case you run out of money. American Express, for example, has set up machines in major airports in which you can purchase traveler's checks using your American Express card.

21. The credit card receipts will serve as accurate record for all but which of the following choices?

22.Which of the following is not true about the use of credit card?

23.Concerning the advantages of credit cards, which of the following is true?

24.According to the passage, which card has set up machines in major airports?

(21)

A．hotel expenses

B．stock exchange

C．plane expenses

D．restaurant expenses

Under the bond terms in international business, if the exporter fails to fulfill its obligations, the compensation should be paid by ______.

A．the importer's bank

B．the exporter's bank

C．the collecting bank

D．the negotiating bank

The author doesn't mention those participants ______ in the London International Financial Futures Exchange( LIFFE ).

A．who want to hedge against interest rate fluctuations

B．who wish to hedge against exchange rate fluctuations

C．who bet on which way interest rate will move

D．both A and B

通过足够的技术和详细的编程知识，用户能够避开安全程序并对生产程序进行更改。可以防止这一可能性的措施是：

A.检查工作记录。

B.将生产程序与单独的控制备份进行比较。

C.定期进行数据检测。

D.适当的职责分离。