单项选择题
A．It is featured by high technology. B．It allows you to imitate famous singers. C．It can automatically alter the tempo and tone of a song. D．It can be placed in specially designed theme rooms.
A．the nature B．the location C．the variety D．the features
A．show that men are stronger than women. B．carry further the ideas of the earlier paragraphs. C．support the first sentence of the same paragraph. D．disown the ideas he is expressing.