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【单选题】纪录片《西藏今昔》以大量珍贵的历史文献资料、影像资料、实物档案等展示出民主改革50年来雪域高原在政治、经济、文化、社会生活等方面发生了翻天覆地的变化。这表明 [ ]
A.
实行民族区域自治，有利于各民族的共同繁荣
B.
坚持民族平等是我国处理民族关系的首要原则
C.
我国各民族一律平等，没有发展程度上的区别
D.
各民族的共同繁荣是加强民族团结的物质保证
【单选题】Businesses put lots of time and money into new plans, programs and excellent employees with the hope things will change．Yet, at the end of the effort, not much changes．What happens? In most cases, tho...
A.
What past experience is useful for businesses?
B.
How much time is needed for making plans?
C.
How can changes be made in businesses?
D.
What kinds of employees are the best?