java题目急求
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发布时间：2022-05-01 18:24
共1个回答
热心网友
时间：2022-06-21 04:00
public class Teacher {
public double add(double a,double b) {
return a + b;
}
public double sub(double a,double b) {
return a - b;
}
}
Student.java
public class Student {
public void speak() {
System.out.println("老师好");
}
}
