【判断题】噪声图像经小波变换之后,有用信号的能量对应着幅值较大、数目较少的小波系数;噪声能量对应幅值较小、数目较多的小波系数,并分散在小波变换后的所有系数中。
【多选题】PLC中CPU状态指示灯的作用包括下列()。
【单选题】Target audiences for international advertising differ in that .
A.
they buy the product for different purposes
B.
some are more humorous and emotional than others
C.
they speak different languages
【判断题】孙玉胜的《东方时空》把新闻变成了“中新体”,其播报态度是要真诚、要平和。()