— Liu Xiang won the 110-meter hurdling gold at the 11th National Games again.
— He is always a super star in my heart. Congratulations to him.
A:prize
B:race
C:competition
D:medal
作图题:有一张地图,图中有A,B,C三地,但地图被墨迹污染,C地具体位置看不清楚了,但知道C地在A地北偏东30°方向上,在B地的南偏东45°,请你用作图的方法确定C地的位置.(保留作图痕迹,不写作法)
已知函数fx=sinx+3cosx的图像关于直线x=a对称,则最小正实数a的值为( )