分别判断图1-1所示各波形是连续时间信号还是离散时间信号,若是离散时间信号是否为数字信号? 2、 分别判断图 1-2 所示各波形是连续时间信号还是离散时间信号,若是离散时间信号是否为数字信号? 3、 分别判断下列各函数式属于何种信号? 4、 分别求下列各周期信号的周期 T : 5、 对于教材例1-1所示信号,由 f ( t ) 求 f (-3 t-2 ) ,但改变运算顺序,先求 f (3 t ) 或先求 f (- t ) , 讨论所得结果是否与原例之结果一致。 6、
【简答题】Last year, I lived in Chile for half a year. I lived with a Chilean family and had the responsibilities of any Chilean ager. I had good days and bad days I didn’t understand. Chuquicamata, my host...
【简答题】阅读理解 Last year,I lived in Chile for half a year. I lived with a Chilean family and had the responsibilities of any Chilean ager. I had good days and bad days I didn't understand. Chuquicamata,my h...