单项选择题

A) commodities C) goods
B) services D) something

A．services
B．commodities C) goods
C．something
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单项选择题
A) something C) anything B) everything D) nothing
A．something
B．everything
C．anything
D．nothing
单项选择题
A) in mm C) at all B) by chance D) on average
A．in mm
B．by chance
C．at all
D．on average
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