A.對(duì)正秩和有0.5和1,對(duì)負(fù)秩和有-0.5和-1 B.對(duì)正秩和有2,對(duì)負(fù)秩和有-2 C.對(duì)正秩和有3,對(duì)負(fù)秩和有-3 D.對(duì)正秩和有1.5,對(duì)負(fù)秩和有-1.5 E.0舍棄不計(jì)