java所有类的根是__________。 A: Class B: System C: Thread D: Object

中国大学MOOC: Vulnerability is characteristic of a system without _________ a specified class of security breaches would not be possible.

Vulnerability is characteristic of a system without _________ a specified class of security breaches would not be possible. A: which B: that C: it D: this

Java中所有类的根类是（ ）。 A: Class B: Java.lang C: System D: Object

​Java中所有类的根类是（ ）。‍ A: Class B: Java.lang C: System D: Object

下面C#程序正确的是()。 A: using System; <br/>class Hello <br/>{ <br/>static void<br/>Main()<br/>{<br/>Console.WriteLine("Hello, world"); <br/>} <br/>} B: using System; <br/>static void Main()<br/>{<br/>Console.WriteLine("Hello, world"); <br/>} C: using System; <br/>class Hello;<br/>static void<br/>Main();<br/>{<br/>Console.WriteLine("Hello, world");<br/>} <br/>} D: using System<br/>class Hello<br/>{ <br/>static void<br/>Main()<br/>{<br/>Console.WriteLine("Hello, world")<br/>} <br/>}

中国大学MOOC: An advantage of the job classification method is that the objective nature of the system makes it easy to write the class and grade descriptions.

以下哪个类是所有类的根父类？（） A:  Exception B:  Object C:  System D:  Class

System with insulation class F are often used; for them a temperature<br/>rise referred to thermal class B is allowed, which guarantees a ____<br/>of safety on the insulation life. A: equivalent B: margin C: adjustable D: rated

不能被实例化的类是( )。 A: Object类 B: Class类 C: Dictionary类 D: System类