若已经定义“struct stu {int num,score;} student;”，则下列输入语句中正确的是（ ）。 A: scanf(“%d”,&score); B: scanf(“%d”,&student); C: scanf(“%d”,&stu.score); D: scanf(“%d”,&student.score);

下列选项中,能够按照 score 由高到低显示 student 表中记录的 SQL 语句是 A: SELECT* FROM student ORDER BY score ; B: SELECT* FROM student ORDER BY score ASC ; C: SELECT * FROM student ORDER BY score DESC ; D: SELECT* FROM student GROUP BY score DESC ;

已知一张表student存储在HBase中，查找student表中id:2015001的{score:math｝成绩，其id作为行键，正确的命令是 A: get 'student', '2015001', 'score:math B: get 'student', '2015001', {COLUMN=>'score:math'} C: get 'student', '2015001', {COLUMN='score:math'} D: get 'student', '2015001', {'score:math'}

以下有关类的声明，正确的是 A: class Student(object) def __init__(self, name, score): self.name = name self.score = score B: class Student(object) def __init__(self, name, score) self.name = name self.score = score C: class Student(object)： def __init__(self, name, score): self.name = name self.score = score D: class Student(object)： def __int__(self, name, score): self.name = name self.score = score

以下各项用于定义结构体类型，并定义结构体变量，其中正确的是________。 A: struct student { char num[5]; int score; }; student stu1,stu2; B: struct student{ char num[5]; int score;};struct student stu1 stu2; C: struct student { char num[5]; int score=96; }; struct student stu1,stu2; D: struct student{ char num[5]; int score;};struct student stu1,stu2;

下列选项中,用于将 student 表按照 gender 字段进行分组查询,并且查询 score 字段值之和小于300的分组的 SQL 语句是 A: SELECT gender , SUM ( score ) FROM student GROUP BY gender HAVING SUM ( score )<;300; B: SELECT gender , SUM ( score ) FROM student GROUP BY gender WHERE SUM ( score )300; C: SELECT gender , SUM ( score ) FROM student WHERE SUM ( score )<;300 GROUP BY gender ; D: 以上语句都不对

从student表中查询学生姓名、年龄和成绩，结果按照年龄降序排序，年龄相同的按照成绩升序排序，下面SQL语句正确的是： A: select name, age, score from student order by age desc , score; B: select name, age, score from student order by age , score asc; C: select name, age, score from student order by 2 desc , 3 asc; D: select name, age, score from student order by 1 desc , 2；

有如下两个关系模式：student(学号，姓名，奖学金) score(学号，课程号，成绩)，则（ ）是score相对与student关系的外键。

CREATE INDEX index_idscore ON student.score(stuID,score),该语句是指为数据库【1】中的表【2】创建了一个索引名为【3】的普通索引

以下关于结构体类型及变量的声明正确的是_____ A: struct student{char name[16];int age}stu1; B: struct student{int age, rank}stu1; C: struct student{char name[16];int age;float score;};student stu1; D: struct student{char name[16];int age, rank;float score;};struct student student;