单项选择题

A．They encourage homelessness.
B．They are a safety hazard.
C．They take up parking spaces.
D．They can be stolen.
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单项选择题
A．The isolated peoples mainly use coins and paper money as the medium of exchange.B．The isolated peoples often engage in business activities with traders from outside.C．The isolated peoples still extensively engage in barter.D．Manufactured goods can be used as money.
A．The isolated peoples mainly use coins and paper money as the medium of exchange.
B．The isolated peoples often engage in business activities with traders from outside.
C．The isolated peoples still extensively engage in barter.
D．Manufactured goods can be used as money.
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