请阅读下面一段示例程序:classPerson:def__init__(self,age):self.__age=agedefset_age(self):self.__age=28person=Person(30)print(person.set_age())运行程序,程序最终执行的结果是()。

下面选项中，用于将表user中字段age值更新为55的SQL语句是 A: ALTER TABLE user set age=55; B: UPDATE user set age=55 where age=55; C: UPDATE user set age=55; D: UPDATE user set age=55 where age<=55;

class Person { String name; int age; [br][/br] public Person(String name, int age) { super(); this.name = name; this.age = age; } @Override public boolean equals(Object obj) { Person person=null; if(obj instanceof Person) person=(Person)obj; if(name.equals(person.name)&&age==person.age) return true; return false; } } class Test{ public static void main(String[] args) { Person person1 = new Person("张三", 12); Person person2 = new Person("张三", 12); System.out.println(person1.equals(person2));//运行结果是？ } } 程序运行结果是什么？ A: true B: false

在C#中,下列结构或者类定义正确的是（选一项） A: public struct Person{ string name； int age； public void ShowName(){ Console.WriteLine(name)； }} B: public struct Person{ string name； int age； public Person(){ Conssole.WriteLine(name)； }} C: public class Person{ string name； int age； public Person(){ Conssole.WriteLine(name)； }} D: public class Person{ string name； int age； public Person(string name){ Conssole.WriteLine(name)； }}

French law says that the penalty for a crime ______. A: is always rigidly set B: may be changed as society changes C: depends on the age of the person committing the crime D: can be reduced if there are extenuating circumstances

将STUDENT表中所有学生年龄AGE字段值增加1岁,应使用命令( ). A: REPLACE AGE WITH AGE+1 B: UPDATE SET AGE WITH AGE+1 C: UPDATE STUDENT AGE WITH AGE+1 D: UPDATE STUDENT SET AGE=AGE+1

class Person { int age; public Person(int age) { ______________//让局部变量的age给成员变量的age赋值 } public int getAge() { return this.age; } } 在横线处填入正确的代码,可以让局部变量的age给成员变量的age赋值

使用SQL命令将STUDENT中的学生年龄AGE字段值增加1岁，应该使用的命令是( )。 A: REPLACE AGE WITH AGE+1 B: UPDATE STUDENT AGE WITH AGE+1 C: UPDATE STUDENT SET AGE=AGE+1 D: UPDATE SET AGE WITH AGE+1

（6-2）定义如下Person类，(1)处合理的代码是。 class Person { String name, department; int age; public Person(String n) { name = n; } public Person(String n, int a) { name = n; age = a; } public Person(String n, int a, String d) { ① department = d; } }

使用SQL命令将学生表STUDENT中的学生年龄AGE字段的值增加1岁,应该使用的命令是（）。 A: UPDATE SET AGE WITH AGE 1 B: UPDATE STUDENT SET AGE AGE+ 1 C: UPDATE STUDENT AGE WITH AGE+ 1 D: REPLACE AGE WITH AGE+1