答案：B
—____________. This is my newly-built house.
— Oh, what a beautiful villa!
A Here it is. B Here you are. C Here we are D Just look at it.
已知，⊙1的半径为5，⊙2的半径为9，且⊙1与⊙2相切，则这两圆的圆心距为（ ）。
