【正确答案】 B

【答案解析】解析：equal n．(地位、能力等)相等的人，匹敌者(如：Women are equals of men；Is he your equal in strength? The French Minister of Foreign Affairs is the equal of the American Secretary of State．)。rival n．(共同争夺某物的)竞争对于，敌手。partner n．伙伴，合伙人；搭档；舞伴。equivalent n．相等物。