实现民族团结和国家统一的文化基础是[ ]
A．对民族文化的认同
B．对民族历史的认同
C．对一个民族风俗习惯的认同
D．对一个民族宗教的认同
答案：A
公文的法定权威性取决于（）
A、公文作者的法定性和公文内容的权威性
B、公文内容的政治性
C、公文标识格式的规定性
D、公文语体风格的独特性
The owner of a bowling alley determined that the average weight for a bowling ball is 12 pounds with a standard deviation of 1.5 pounds. A ball denoted "heavy" should be one of the top 2 percent based on weight. Assuming the weights of bowling balls are normally distributed, at what weight (in pounds) should the "heavy" designation be used（）
A. 15.08 pounds.
B. 14.00 pounds.
C. 14.22 pounds.
