单项选择题

According to the passage, a barter economy can lead to ______.

A．rapid speed of transaction
B．inflation
C．misunderstandings
D．difficulties for the traders
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单项选择题
What is the main purpose of the passage
A．To outline contrasting types of economic systems.
B．To explain the science of economics.
C．To argue for the superiority of one economic system.
D．To compare barter and money-exchange markets.
单项选择题
In describing White as a word-artist , the author means that White ______.
A．was also a cartoonist
B．was colorful in his descriptions
C．had artistic background
D．was a great writer
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