A:青鱼
B:鲢鱼
C:鳙鱼
D:鲫鱼
有一艘渔船上午九点在A处沿正东方向航行,在A处测得灯塔C在北偏东60°方向上,行驶2小时到达B处,测得灯塔C在北偏东15°方向,求∠C的度数.
What are people supposed to do when they meet for the first time in China?( )