球的半径为R，则其表面积及体积分别为（）。
A.（4/3）πR3和4πR2
B.4πR2和（4/3）πR3
C.πR2和πR3
参考答案：B
No matter how frequently ， the works of Beethoven still attract people all over the world. [ ]
A. performed
B. performing
C. to be performed
D. being performed
手势与讲话时的感情没有关联。
