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【单选题】
设有如下代码: interface IFace{} class CFace implements IFace{} class Base{} public class ObRef extends Base{ public static void main(String argv[]){ ObRef obj = new ObRef(); Base b = new Base(); Object obj1 = new Object(); IFace obj2 = new CFace(); //Here } } 则在 //Here 处插入哪个代码将出现编译和运行错误。A.
obj1=obj2;
B.
b=obj;
C.
obj=b;
D.
obj1=b;
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皮皮学刷刷变学霸
举一反三
【单选题】What can NOT communications technology do according to the passage?
A.
To help people communicate without seeing each other.
B.
To help conduct the conversation without talking with each other directly.
C.
To help people get other's phone numbers.
D.
To help shorten the distance between people.
【单选题】They are well ______ with each other since they were little kids living in the same community..
A.
identified
B.
recognized
C.
acknowledged
D.
acquainted
【简答题】PDCP子层的主要功能?
【单选题】What invention incorporated the principles of light and radio radiation?
A.
satellite communication
B.
X-ray
C.
the laser beam
D.
continuous wave
【单选题】菲利普.科特勒在原有的4P理论上加入了()和(),形成了6P理论?
A.
公共关系和政治权利
B.
公共关系和政府关系
C.
公共关系和环境保护
D.
消费者便利性和沟通
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