[单项选择]下题基于如下叙述:关系模式Student(Sno, Sname, Cno, Cname, Grade, Tname, Taddr)的属性分别表示学号、学生姓名、课程号、课程名、成绩、任课教师名和教师地址。其中,一个学生可以选修若干门课程,一个教师可以讲授若干门课程,一门课程可以由若干教师讲授,一个学生选修一门课程时必须选定讲授课程的教师,教师不会重名。关系模式Student的规范化程度最高达到( )。 A. 1NF B. 2NF C. 3NF D. BCNF
第24题: [单项选择]{{B}}Passage one
Questions 26 to 28 are based on the passage you have just heard.
{{/B}} A. Two days after the cat’s disappearance. B. Three days after the cat’s disappearance. C. Right after the cat’s disappearance. D. Four days after the cat’s disappearance. 参考答案:B 答案解析:[听力原文]26-28
Kidnappers are rarely interested in animals, but they recently took considerable int
第35题: [单项选择]下列哪项不能作为糖尿病确诊的依据() A. 多次空腹血糖≥7.8mmol/L B. 尿糖(++) C. 餐后血糖≥11.13mmol/L D. 葡萄糖耐量试验1小时和2小时血糖均>11.13mmol/L E. 无"三多一少"症状,血糖多次在7.8~11.13mmol/L之间 参考答案:B