自然数按能否被2整除可以分为请选择CBA'{1\7D6y'n7q;J2V/~(R3e;V3L:@6Z(A5[6l5W3z
A.奇数和偶数/~(R3e;V3L:@6Z(A5[6l5W3z
B.质数和合数/~(R3e;V3L:@6Z(A5[6l5W3z
C.质数、合数和1/~(R3e;V3L:@6Z(A5[6l5W3z