单项选择题
已知: 则输出为()
A.GraduateStudent B.Student C.Person D.Object
已知: 该输出是?()
A.ccccc B.cbcbb C.cbccc D.cbcbc
已知: 则该为()?
A.a B.ac C.bc D.abc
A.BorderLayout的WEST和EAST B.BorderLayout的NORTH和SOUTH C.GridLayout D.FlowLayout
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