题干
Teachers' Day is coming. ______ are you going to do for your teacher?
A：Who
B：Where
C：What
答案(点此获取答案解析）
C
Teachers' Day is coming. ______ are you going to do for your teacher?
A：Who
B：Where
C：What
（2x2-3x+1）的递减区间为 （ ）