单项选择题

A．574340.
B．574430.
C．547430.
D．547740.
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单项选择题
A．The chemistry lab.B．The language lab.C．The physics lab.D．The chemistry and physics lab.
A．The chemistry lab.
B．The language lab.
C．The physics lab.
D．The chemistry and physics lab.
单项选择题
A．An Economic Company.B．An Electronic Exhibition.C．A Family Shopping Center.D．A washing machines factory.
A．An Economic Company.
B．An Electronic Exhibition.
C．A Family Shopping Center.
D．A washing machines factory.
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