下列的数组定义语句正确的是
A. int[][] a=new int[3][4];
B. int[,] a=new int a[3][4];
C. int [,] a=new int[3][];
D. int[,] a={1,2,3,4};
如下数组声明语句中不正确的是
A. int[ ][ ] a=new int[4][2]{{1,2},{3,4},{5,6},{7,8}};
B. int[ ][ ] a=new int[ ][ ]{{1,2},{3,4},{5,6},{7,8}};
C. int[ ][ ] a={{1,2},{3,4},{5,6},{7,8}};
D. int[ ][ ] a={{1,2}};