A.save the cost of the airframe B.improve some aircraft components
C.save the cost of labour D.develop new technology
4.According to the author, a wise established manufacturer should ______.
A.try to benefit from both financial and technical resources
B.break up his partnership with the East once profits are made
C:keep a tight told over hi-tech development and marketing of airliners
D.collaborate with Asian partners for a short time
5.The word base in the last paragraph represents_______.
A.a production place
B.the initial operation of building aircraft
C.a research institute
D.a position where to start building
答案:CDADA
2
第二十三篇
There are various ways in which individual economic units can interact with one another. Three basic ways may be described as the market system, the administered system, and the traditional system.
In a market system individual economic units are free to interact among each other in the marketplace. It is possible to buy commodities from other economic units or sell commodities to them. In a market, transactions may take place via barter or money exchange. In a barter economy, real goods such as automobiles, shoes, and pizzas are traded against each other. Obviously, finding somebody who wants to trade my old car in exchange for a sailboat may not always be an easy task. Hence, the introduction of money as a medium of exchange eases transactions considerably. In the modern market economy, goods and services are bought or sold for money.
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