下列运算中，正确的是[ ]
A．3a2﹣a2=2
B．（a2）3=a5
C．a3a6=a9
D．（2a2）2=2a4
答案：C
— What would you like to drink?
— It doesn't matter. _____ will do. [ ]
A. Anything
B. Everything
C. Nothing
D. Something
简述三大战役的意义。
