单项选择题

A．present an original ideaB．describe a new processC．arg……

The main purpose of the passage is to ______.

A．present an original idea
B．describe a new process
C．argue against an established practice
D．comment on a skill and its techniques

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单项选择题According to the passage, ______ has the greatest degree of control in an administered system.

A．individual households
B．major corporations
C．small businesses
D．the government

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

A．rapid speed of transaction
B．inflation
C．misunderstandings
D．difficulties for the traders

单项选择题In the second paragraph, the word real in real goods could best be replaced by ______.

A．high quality
B．concrete
C．utter
D．authentic

单项选择题Which of the following is not mentioned by the author as a criterion for determining a person's place in a traditional society

A．Family background.
B．Religious beliefs.
C．Age.
D．Custom.