一幅美丽的图案，在某个顶点处由四个边长相等的正多边形镶嵌而成，其中的三个分别为正三边形，正四边形，正六边形，则另外一个为（   ）

—Are the beaches in Dalian beautiful?

—Sure. They___________ lots of tourists from home and abroad every year.

 --- Kangkang, could you tell me how to cook noodles?

   --- OK. First, you should_______ham, cabbage and onions finely.