当我们参与社会合作竞争的时候，在我们遇到不公平的事情时，都需要公平作为支撑．从这个角度来说（　）​

下列几种声音中，属于噪声的是（　　）

    Mrs Smith's living room is large. There is a television in the room. The television is near the window. There are some magazines on the television. There is a table in the room. There are some newspapers on the table. There are some armchairs in the room. The armchairs are near the table. There is a stereo in the room. The stereo is near the door. Mrs Smith often listens to music from it.

制作年代标尺是历史学习的有效方法之一，它能将复杂的历史较直观形象的展示出来。下面是一位同学在复习中国古代某一历史时期政权更迭时制作的年代标尺，其中③处应该是(     )