【简答题】The following is a story with all the details contributing to bringing out the thesis: A Kindness Is Never Lost . A. Read the story and then complete an outline of another narrative story with the sam...
【单选题】用一定比例尺把线路中心线及两侧的地形地貌投影到水平面上,就得到线路( )图。
【简答题】We chatted for half an hour before he finally _____: He wanted to work as a business consultant and wondered if I could pass along the names of certain potential s.2 2. Scientists at the researc...
【单选题】下列叙述中哪些不是主动转运的特点
C.
需要有特定载体,在膜两边来回穿梭,担负着转运任务
【单选题】对语音信号进行脉码调制(PCM)时采样频率应( )。
C.
≥8000次×log2N,N为每个码元状态数
【简答题】对语音信号进行脉码调制(PCM)时采样频率应()。A. ≥8000次/s
【判断题】游客要住本饭店内高于合同规定标准的房间,地陪可直接与饭店联系,如有,可以满足,但游客要付饭店房费差价。( )
【简答题】对于脉冲编码调制PCM来说,如果要对频率为800Hz的某种语音信号进行采样,传送PCM信号的信道带宽为2KHz,那么采样频率f符合什么条件时,采样的样本可以包含足够重构原语音信号的所有信息请说明理由。