The filtered signal will have a time delay compared with the original signal. ( )
对
举一反三
- 2. Railway signals can be divided into home signal, starting signal, distant signal, repeating signal and shunting signal.
- According to the meaning of stop signal, it is divided into absolute signal and permissive signal.
- In the time domain， the procedure of restoring the original continuous-time signal from discrete sample values is called_______
- The signal transmission portion of the analog video surveillance system is responsible for the upstream transmission of the video signal and the downstream transmission of the control signal. ( ) A: 正确 B: 错误
- In an inversion-recovery experiment, at the null point, t0, for a tissue with a short T1 relaxation time, the tissue will:（反转恢复实验中，对于一种T1弛豫时间短的组织的过零点t0，组织会：） A: ) have an observable signal, while long T1 tissue will have no signal.（有可以被观测到的信号，长T1的组织没有信号） B: ) have no observable signal, while long T1 tissue will have signal.（没有可以观测的信号，长T1的组织会有信号） C: ) have a similar signal intensity to long T1 tissue.（和长T1组织有相同的信号）
内容
- 0
The original kites were used ______. A: as a way to have a fun B: as a signal C: in religious ceremonies D: as tools for study weather
- 1
The main function of time signal is to connect details.
- 2
Which of the following can be referred to as a time signal?
- 3
What do signal words of time include?
- 4
What is the target to recognize the signal words of time?