程序段:char str[10]="98ab765";int i;for(i=0;str[i]>='0'&&str[i]<='9';i++)printf("%c\t",str[i]);则输出结果是:()
A. 98765
B. 98
C. 9 8ab
D. 98AB765
定义char s1[50],s2[50],则正确输入语句是:()
A. gets(s1,s2);
B. gets(s1[],s2[])
C. scanf("%s%s",&s1,&s2)
D. scanf("%s%s",s1,s2)