长期使用泼尼松的不良反应是（）

A.血小板减少

B.心力衰竭

C.肾功能不全

D.骨质疏松

E.再生障碍性贫血

以下程序运行时输出到屏幕的结果是【6】 。#includevoid main(){FILE *fp; int k,n,a[6]={1,2,3,4,5,6}; fp=fopen("d2.dat","w");’ fprintf(fp,"%d%d%d\n",a[0],a[1],a[2]); fprintf(fp,"%d%d%d\n",a[3],a[4],a[5]); fclose(fp); fp=fopen("d2.dat","r"); fscanf(fp,"%d%d",&k,&n); printf("%d,%d\n",k,n); fclose(fp);}