单项选择题

A．The weakness of the price system.
B．The complexities of the price system.
C．Credit terms in transactions.
D．Resource allocation and the public service
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单项选择题
A．The strength of its shipbuilding industry.B．The physical features of the river itself.C．The abundance of fruit, vegetables, and livestock.D．The similarity of climate to that in Europe.
A．The strength of its shipbuilding industry.
B．The physical features of the river itself.
C．The abundance of fruit, vegetables, and livestock.
D．The similarity of climate to that in Europe.
单项选择题
A．How to care for precious metals.B．A standard unit for measuring weight.C．The value of precious metals.D．Using the metric system.
A．How to care for precious metals.
B．A standard unit for measuring weight.
C．The value of precious metals.
D．Using the metric system.
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