我国民族区域自治制度的核心是（）。
A. 保障少数民族人民当家作主
B. 实现少数民族经济的发展
C. 实现民族平等、团结和合作
D. 实现各民族的共同繁荣
According to Mr. Gretz, the present sum of money will enable the scientists to provide
A. more than 3% of the EEC's needs after the year 2000
B. only 3% of the EEC's needs before the year 2000
C. less than 3% of the EEC's needs before the year 2000
D. 3% of the EEC's needs after the year 2000
遵义会议集中解决了具有决定意义的最紧迫的问题是（）。
A. 政治路线问题
B. 军事问题和组织问题
C. 策略问题
D. 思想路线问题
All numbers divisible by both 3 and 8 are also divisible by which one of the following numbers？
A. 5
B. 6
C. 9
D. 21
E. 38
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