计算:(x+2)2(x﹣2)2.
解:(x+2)2(x﹣2)2,
=[(x+2)(x﹣2)]2,
=(x2﹣4)2,
=x4﹣8x2+16.
上层建筑的核心是( )
A.思想意识形态
B.军队
C.监狱
D.国家 * *
World No Smoking Day is ________ May 31.
A. in B. on C. at