单项选择题有以下程序#include main(){ FILE *fp; int a[10]={1,2,3,0,0},i;fp=fopen( d2.dat , wb );fwrite(a,sizeof(int),5,fp);fwrite(a,sizeof(int),5,fp);fclose(fp);fp=fopen( d2.dat , rb );fread(a,sizeof(int),10,fp);fclose(fp);for(i=0;i 1,2,3,0,0,0,0,0,0,0,B. 1,2,3,1,2,3,0,0,0,0,C. 123,0,0,0,0,123,0,0,0,0,D. 1,2,3,0,0,1,2,3,0,0,