单项选择题

A．A space flight center.
B．A museum.
C．A monument.
D．A rocket research center.
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单项选择题
A．We can read the information on the music.B．We can get a set of records of the music.C．We can hear an example of the music.D．Both A and C.
A．We can read the information on the music.
B．We can get a set of records of the music.
C．We can hear an example of the music.
D．Both A and C.
单项选择题
A．56%.B．96%.C．24%.D．28%.
A．56%.
B．96%.
C．24%.
D．28%.
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