— Where is the bag?
— It's the chair. ( )
We ____ ____ ____ Kang kang's birthday party. All of us had a good time.
定义在﹣1,1上的函数y=f(x)是减函数,且是奇函数,若f(a2﹣a﹣1)+f(4a﹣5)>0,求实数a的取值范围.