已知“int[] a={1,2,3,4,3,2,1};”,则a[a[1]]=( )
A. 2
B. 3
C. 4
D. 以上都不对
已知数组a1与a2定义如下:int[] a1={2,3,5,7,11,13};int[] a2={1001,1002,1003,1004,1005,1006,1007};在执行完语句“System.arraycopy(a1 , 2 , a2 , 3 , 4 );”后,数组a2的值
A. {1001,1002,1003,1004,1005,1006,1007}
B. {1001,1002,3, 5 ,7 ,11 ,1007}
C. {1001,1002,1003,5, 7, 11, 13}
D. 以上都不对