Given that Student is a class, how many reference variables and objects are created by the following code? Student studentName, studentId; studentName = new Student(); Student stud_class = new Student();
举一反三
- python中，下列哪种语法表示Student从Person中继承。（ ） A: class Student: Person B: class Student extends Person C: class Student (Person) D: class Student: class Person
- 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?
- 下面是几条定义类的语句，不能被继承的类是（ ）。 A: abstract class Student {} B: class Student{} C: public class Student{} D: sealed class Student{}
- 将student表中class字段删除的命令是（）。 A: DROPTABLEstudentclass B: ALTER TABLE student class C: ALTER TABLE student DROP class D: DROP TABLE student ALTER class
- 【单选题】定义一个学生类Student,则初始化一个学生对象的语句是( A. Student s ； B. Student s = new Student(); C. Student s = new student(); D. Student s = s.student();