【单选题】某学校为新生开设了 4 门选修课程,规定每位新生至少要选其中 3 门,则一位新生不同的选课方案共有()
【单选题】I had to buy of these books because I didn’t know which one was the best.
【单选题】I didn’t know the girl you the sheep.
【单选题】某学校为新生开设了4门选修课程,规定每位新生至少要选其中3门,则一位新生不同的选课方案共()。
【简答题】I didn’t know I had opened Pandora’s box when I entered this room.
【单选题】I sooner but I didn’t know that they were waiting for me.
【单选题】某学校为新生开设了4门选修课程,规定每位新生至少要选其中3门,则一位新生不同的选课方案共有 ( )
【简答题】某学校要对学生成绩进行计算机管理。该学校有若干学生,每个学生有学号、班级、姓名、性别、出生日期、地址。开设的课程需要管理课程编号、课程名称、学分和学生选修该课程后的成绩等信息。该学校规定:一个学生可以有选修多门课程,一门课程可以有多名学生选修。 1. 画出此管理系统的ER模型。 2. 简述ER模型向关系模式转换的一般方法。 3. 将以上ER模型转化为关系模式,包括主键、外键。 4. 试用S...
【单选题】我国关于葡萄酒的保质期一般会写( )年。
【简答题】When I was a kid I didn’t know what I wanted to be when I grew up, but I knew what I didn’t want to do. I didn’t even really know what one was. My elder brother is deaf. Growing up, I ended up defendi...