Question

若x＞1＞y,下列不等式中不成立的是(    )

A.x-1＞1-y                          B.x-1＞y-1

C.x-y＞1-y                          D.1-x＞y-x

Answer 1

解析:∵x＞1＞y,

∴x+(-1)＞y+(-1),即B正确;

x+(-y)＞1+(-y),即C正确;

1+(-x)＞y+(-x),即D正确.

故选A.

答案:A