题干
—Besides Kate，Linda also took part in the party．
— So many of you were there．
A：Instead of
B：Except for
C：In addition to
答案(点此获取答案解析）
C
—Besides Kate，Linda also took part in the party．
— So many of you were there．
A：Instead of
B：Except for
C：In addition to
，定义运算
，其中
是常数，等式右边的运算是通常的加法和乘法运算。已知
，并且有一个非零常数
，使得对任意实数
， 都有
，则