查询“学生表t_student”中的前5条记录，字段为学号和姓名。 A: SELECT TOP 5 student_no, student_name<br/>FROM t_student B: SELECT LIMIT 5 student_no, student_name<br/>FROM t_student C: SELECT TOP 5 student_no, student_name<br/>FROM D: SELECT 5 student_no, student_name<br/>FROM t_student

She is a new student. (改为一般疑问句） A: She is a new student? B: She isn't a new student? C: Is she a new student? D: Isn't she a new student?

定义字符数组正确的是（）。 A: chars[]="Student"； B: chars[7]="Student"； C: chars[7]={’S’，’t’，’u’，’d’，’e’，’n’，’t’}； D: chars[]={"Student"}；

设s=’I AM A STUDENT’ , t=’GOOD’ , q=’WORKER’则Concat(Substring(s,6,2),Concat(t,Replace(s,’STUDENT’,q)))=( )

设有串 t='I am a good student ' ，那么 Substr(t,6,6)= （

it/ the /characterized /in /student /activism /the/ wasn’t/ just/ that/ life /1960s

【单选题】类Teacher和Student是类Person的子类; Person p; Teacher t; Student s; //p, t and s 非空 if(t instanceof Person) { s = (Student)t; } 最后一条语句的结果说法正确是()。 A. 将构造一个Student对象 B. 表达式是合法的 C. 表达式是错误的 D. 编译时正确，但运行时错误

查找学生表student中姓名的第二个字为“t”的学生学号sno和姓名sname，下面SQL语句正确的是（）。 A: SELECT sno, sname FROM student WHERE sname='_t%'; B: SELECT sno, sname FROM student WHERE sname LIKE '_t%'; C: SELECT sno, sname FROM student WHERE sname＝'%t_'; D: SELECT sno, sname FROM student WHERE sname LIKE '%t_';

Whether a student is good or bad shouldn't _________only by examination results.

中国大学MOOC: There are many (girl,student)________in this class, aren’t there?