You are asked to attend the meeting ______ in the hall this weekend.

A．being held

B．to be held

C．held

D．holding

下列哪些不是形变动画的变形对象（）。

A.矢量图形和矢量线条

B.矢量曲线和矢量图形

C.矢量图形和矢量线段

D.矢量线条和矢量线段