30.下列哪个类起徽章的作用( )
A. page-header
B. jumbotron
C. badge
D. thumbnail
制作tab切换,要显示的内容要放在下方哪个容器里面()
A. content
B. tab-group
C. tab-body
D. tab-content
31. 怎样为进度条创建条纹效果( )
A. 添加类progress-bar-striped
B. 添加类progress-bar
C. 添加类progress-striped
D. 添加类progressBar-striped
#include main(){ int x, y =0;for(x=1;x<=10;x++){if(y>=10)break;y=y+x;}printf(“%d , %d”,y,x);}该程序运行结果为,