单选题：According to the statement `int a[][3]={1,2,3,4,5,6,7};`，The siz

According to the statement `int a[][3]={1,2,3,4,5,6,7};`，The size of the first dimension of the array a is ( )。@[B](2)
A. 2
B. 3
C. 4
D. uncertain




A.2
B.3
C.4
D.uncertain


答案：B