利用出入口控制系统的4W信息用来核实身份,体现了该系统的( )
A.安全性
B.使用方便性
C.应用灵活性
D.功能扩展性
参考答案:D
In my English class, there is a young boy who never talk. The boy, Michael, simply does not talk in class. No matter so much talking is occurred around him, Michael is never affected. Instead, he sits quietly at his desk and listens attentive to the rest the students talking and the teacher speaking. One day, Michael was surprised us all by raising his hand. He was actually attempting to talk. Interesting and curious at that was going to happen when he got called on, we all leaned forward against our desks looking at him with our eyes wide open. There was total silence in the room as the teacher call aloud his name.
计算机内采用二进制的主要原因是()。
A、运算速度快
B、运算精度高
C、算法简单
D、电子元件特征