— Is this ________ bike?
— No. ________ is over there.
A:your; My
B:you; I
C:your; Mine
D:yours; Mine
有一把准确的秤,不慎将秤砣碰掉了一块,那么再称物体,它的读数将( )
(Ⅰ)求f(﹣1),f(2.5)的值;
(Ⅱ)求f(x)在﹣3,3上的表达式;
(Ⅲ)求f(x)在﹣3,3上的最值.