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  3. Prices determine how resources are to be used. They are also the means by which products and services that are in limited supply

Prices determine how resources are to be used. They are also the means by which products and services that are in limited supply

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问题      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 net work composed of the prices of all the products bought and sold in the economy as well as those of a great number of services, including labour, professions, transportation, and public-utility services. The interrelationship of all these prices makes the "system" of prices. The price of any particular product or service is linked to a broad, complicated system of prices in which everything seems to depend more or less upon everything else.
     If one were to ask a group of randomly selected individuals to define "price", many would reply that price is an amount paid by the buyer to the seller of a product or service, or the money value of a product or service as agreed upon in market transaction. This definition is, of course, valid as for it goes. For a complete understanding of a price in any particular transaction, much more than the money involved must be known. Both the buyer and seller should be familiar with not only the money amount, but with the amount and quality of the product or service to be exchanged, the time and place at which the exchange will take place and payment will be made, the form of money to be used, the credit terms and discounts that apply to the transaction, guarantees on the product or service, delivery terms, return privilege, and other factors. In other words both the buyers and sellers should be fully aware of all the factors that compose the total "package" being exchanged for the asker for amount of money in order that they may evaluate a given price.
According to the passage, the price system is related primarily to ______.
选项 A、products and services
B、transportation and insurance
C、labour and education
D、utilities and repairs
答案A
解析 细节题。参阅第一段第三、四句，即"The price system of the United States is a very complex net work composed of the prices of all products bought and sold in the economy as well as those of a great number of services...”，“The interrelationship of all these prices makes the
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