----- That is how you can get to the hotel. Have I made myself clear?

----- I’m afraid I don’t quite catch with you.

----- OK. __________

A．How stupid you are!

B．You got it, didn’t you?

C．I’ll say it in another way.

D．Forget it.

圆锥底面半径为6cm，母线长为10cm，则它的侧面展开图圆心角等于______，表面积为______；