在3dmax6中，生成动画最常用的方法是（）
A.关键帧
B.黑白帧
C.黑帧
D.白帧
参考答案：A
Not only China but also other countries _____ trying to develop their own economy.[ ]
A. is
B. are
C. has
D. be
今日はめずらしく帰りは早い。
A．貴しく
B．異しく
C．怪しく
D．珍しく
