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【判断题】
低成本航空公司的特点是低成本,低票价。( )A.
正确
B.
错误
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【简答题】What is the opportunity?
【单选题】According to Mr. Hall, what is opportunity cost?
A.
It is the relationship between two kinds of goods or services that customers may want to buy.
B.
It is people's choice of goods and services at similar prices.
C.
It is the relative value of goods to buyers compared to the value of alterative goods and services on which they may want to spend that same amount of money.
【简答题】Suppose that your college charges you separately for tuition and for room and board. A. What is a cost of attending college that is not an opportunity cost? B. What is an explicit opportunity cost of ...
【简答题】What is opportunity cost and how opportunity comes out?
【简答题】(5空)塑料是以 为基本成分,它在加工过程中可塑制成一定形状,而产品最终能保持形状不变的材料。根据高温受热后能否二次加工的不同,塑料可分为: 和 两大类。前者可反复受热软化或融化而进行再加工,后者经固化成型后,再受热则不能熔化,强热则分解。根据生产量和使用情况可以分为量大而广的 和作为工程材料使用的 。
【简答题】dTMP是由（）经（）修饰作用生成的。
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