. She is a kind-hearted woman and often has _____ mercy _____ people who are in trouble.

A．a; on

B．\; on

C．a; o

D．\; to

吴楚“七国之乱”是以吴王刘濞为首发动的一次同姓王联合大盘乱，参与叛乱的七国国王是吴王刘濞、楚王刘戊，赵王刘遂、济南王刘辟光，淄川王刘贤、胶西王刘昂、胶东王刘雄渠。其本质是由削藩导致的权利战争。