单项选择题

What factor can be attributed to German prosperity

A．Technology transfer.
B．Good management.
C．Hard work.
D．Fierce competition.
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单项选择题
Which of the following is NOT true of traditional university research
A．It is free.
B．It is profit-driven.
C．It is widely available.
D．It is curiosity-driven.
单项选择题
One special feature of Crystal Ear is that
A．you can control its volume.
B．you needn't take it off every day.
C．it is solar-powered.
D．it saves power.
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