单项选择题

What determines the price of a good in a market economy

A．The cost of all elements in production.
B．The cost of not making other goods.
C．The efficiency of the manufacturing process.
D．The quantity of materials supplied.

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热门试题

单项选择题

Don Cameron's company______.

A．is the only one of its kind in Britain
B．made the first balloon in Europe
C．has made most of the balloons in Britain
D．is now the largest in the world

单项选择题

Don Cameron's interest in flying______.

A．began when he was very young
B．began at university
C．came from a with to imitate his grandfather
D．was the result of his professional experience