车轮作动平衡试验时,要输入a、b、d三个尺寸,其中b是指()
A. 轮辋宽度
B. 轮辋直径
C. 轮辋到测试机边缘的距离
D. 其他
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阅读下面的程序,分析代码是否能编译通过,如果能编译通过,请列出运行的结果。如果不能编译通过,请说明原因。interface Animal {void breathe();void run();void eat(){};}class Dog implements Animal {public void breathe() {System.out.println("I’m breathing")}public void eat() {System.out.println("I’m eathing")}}public class test04 {public static void main(String [] args) {Dog dog = new Dog();dog.breathe();dog.eat();}}
编程练习:编写Animal接口,接口中声明run()方法。定义Bird类和Fish类实现Animal接口。编写Bird类和Fish类的测试程序,并运用接口回调的思路调用其中的run()方法。请在答案中附上代码以及运行结果截图,注意,代码和截图都不要使用附件上传。
Pollution refers primarily to the of air, water, and land by wastes.
A. killing
B. fouling
C. handling
D. controlling
What environmental problems do we have nowadays?
A. sand storm
B. deforestation
C. desertification
D. soil erosion
E. global warming
F. pollution