在索契冬奥会上,为我国获得冬奥史上第一枚速度滑冰金牌的是( )
A:王北星
B:张虹
C:刘翔
D:丁俊晖
若数轴上点A表示的数是﹣3,则与点A相距2个单位长度的点B表示的数是( )
The teacher asked a very difficult question. It was Ted who finally _____ a good answer.