在成绩属性列grade上创建用户自定义完整性约束，要求grade的值在0至100分之间，约束名ck_takes_grade。请写出对应的完整性命名子句___________________________________

The most common division between primary and secondary education in the US is ___________.（ ） A: primary schools (Grade 1 to Grade 6) and middle schools (Grade 7 to Grade 12) B: elementary schools (Grade Kindergarten to Grade 8) and high schools (Grade 9 to Grade 12) C: elementary schools (Grade Kindergarten to Grade 3), middle schools (Grade 4 to Grade 6) and high schools (Grade 7 to Grade 12) D: grammar schools (Grade Kindergarten to Grade 6) and high schools (Grade 7 to Grade 12)

Which grade were they in? A: Grade 8 B: Grade 9 C: Grade 10 D: Grade 11

【单选题】5. 假定student表中有字段grade,grade代表分数,依次统计grade字段的最大值,最小值,平均值的SQL语句是 A. SELECT max(grade),min(grade),average(grade) FROM student; B. SELECT max(grade),min(grade),avg(grade) FROM student; C. SELECT min(grade),average(grade),max(grade) FROM student; D. SELECT min(grade),avg(grade),max(grade) FROM student;

What grade is the woman in A: Grade one. B: Grade two. C: Grade three.

They are the students of ______. A: grade 7 B: Grade 7 C: 7th grade D: Grade 7th

- Frau Chen, wie schreibt ____„Stück“? Mit„k“oder„ck“ ?-„Stück“schreibt ___ mit„ck“ .

This bed （） too much room. A: takes off B: takes up C: takes on D: takes over

【单选题】We’ll have to finish the job, _____. A. long it takes however B. it takes however long C. however long it takes D. long however it takes A. Long it takes however B. it takes however long C. however long it takes D. long however it takes

查询统计选课表SC中成绩列Grade的最小值，可以用_______函数。 A: Min(Grade) B: Max(Grade) C: Avg(Grade) D: Sum(Grade)