已知函数f(x+1）是偶函数，当$x\in (-\infty ,1)$时，函数f(x)单调递减，设$a=f(-\frac{1}{2}),b=f(-1),c=f\left(2\right)$，则a，b，c的大小关系为（ 　）

若数列$\left\{a_n\right\}$满足$\frac{a_{n+1}^2}{a_n^2}=p$（$p$为正常数，$n\in N*$），则称$\left\{a_n\right\}$为“等方比数列”．甲：数列$\left\{a_n\right\}$是等方比数列；     乙：数列$\left\{a_n\right\}$是等比数列，则（   ）

——The relation between the two countries gets _________. A war seems to break out soon .
——I hope they will make peace with each other .