髓室由几个面组成()
A.2个面
B.3个面
C.4个面
D.5个面
E.6个面
参考答案:E
已知点A(a-1,2)与点A′(2,b+1)关于y轴对称,求a2013+b2014的值.
I can’t play soccer because I have ______ homework today.
A. too much B. too many C. much too