单项选择题

A．Farm workers.
B．White-collar workers.
C．Blue-collar workers.
D．Not mentioned.
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单项选择题
A．He has hurt his hand.B．He can’t fix it.C．He is very busy at the moment.D．He wants the woman to give him a hand.
A．He has hurt his hand.
B．He can’t fix it.
C．He is very busy at the moment.
D．He wants the woman to give him a hand.
单项选择题
A．There have been three major changes in TV technology since 1927.B．Basic TV technology nowadays is quite different from that of the first TV set.C．Digital TV sets incorporate computer technology.D．Digital TV technology originated in the U. S.
A．There have been three major changes in TV technology since 1927.
B．Basic TV technology nowadays is quite different from that of the first TV set.
C．Digital TV sets incorporate computer technology.
D．Digital TV technology originated in the U. S.
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