Which of the following is not a component of modern lubricant？ A: Lubricant base oil B: Lubricant additives C: Crude oil

Tools菜单的New Component的功能是 ， Remove Component的功能是， Rename Component的功能是， Copy Component的功能是

标准以太网指的是 ( ) A: 10 BASE 5 B: 10 BASE 2 C: 10 BASE T D: 100 BASE T

（6-2）定义如下Base类，能在(1)处正确调用Base的构造方法。 class Base{ int x,y; Base(int x){} Base(int x,int y){ //(1)调用Base的构造方法 } }

An optical cable is used to transmit：（） A: digital audio from a component to a receiver. B: analog video from a component to a receiver. C: analog audio from a component to a receiver. D: digital video from a component to a receiver.

The following are all true about flat tax except that A: it is same tax rate to everyone. B: it is same tax rate to each component of income. C: it allows a tax base with no deductions with a few exemptions and<br/>expenses. D: it collects the same amount of tax from everyone.

如何能使程序调用Base类的构造方法输出"base constructor"; class Base{ Base(int i){ System.out.println("base constructor"); } Base(){  } } public class Sup extends Base{ public static void main(String argv[]){ Sup s= new Sup(); //One } Sup() { //Two } public void derived() { //Three } }

给出下面的代码段 public class Base{ int x, y; static int z; public Base(int a,int b)<br/>{ x=a; y=b; } } 以下代码错误的是?(). A: Base b=new Base(); <br/>b.z=10; B: Base b=new Base(1,2); <br/>b.z=10; C: Base.z=10; D: Base b=new Base(1,2);<br/>b.x=2;

（6-2）以下代码会出现编译错误。 class Base{ public Base () { System.out.println("1"); } public void Base () { System.out.println("2"); } }

1. In an open-loop control system, there is ( ). A: no feedback component B: no actuator C: no controller D: no amplification component