西晋是个短命王朝,促使其灭亡的原因很多,如图的“晋墓壁画”反映的史实,可以印证导致西晋灭亡的哪一点( ) A . 贵族集团生活奢侈腐化 B . 皇族为争权相互混战 C . 阶级和民族矛盾激化 D . 各族人民起义反晋 答案:A9. Mary all the housework, she dropped herself into the sofa ? sighing with relief.A. finished B. had finishedC. having finished D. finishing