A 8个          B 7个          C 6个          D 5个      

A a²>b²         B <img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/20120920160794789478.gif" />>1         C <img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/20120920160749904990.gif" /><<img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/2012092016070387387.gif" />        D 5a>5b

A 空集     B {x|-3<x<<img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/2012092016110629629.gif" />}     C 全体实数     D {x|x><img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/20120920161228702870.gif" />或x<-3}

A 不等于-<img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/20120920161320302030.gif" />的全体实数                 B 全体实数集 C 空集                                D x≠<img alt="" src="https://www.beizhujiaoyu.com/uploads/202208/20120920161365166516.gif" />的一切实数