Two light sources are said to be coherent if they ( ) A: are of the same frequency. B: are of the same frequency and amplitude. C: are of the same amplitude, and maintain a constant phase difference. D: are of the same frequency, and maintain a constant phase difference.

在audition cs6中effects amplitude and compression

Sampling of an analog signal produces对一个模拟量采样，产生 A: a series of impulses that are proportional to the amplitude of the signal.与信号幅值成正比的一系列脉冲。 B: a series of impulses that are proportional to the frequency of the signal.与信号频率成正比的一系列脉冲。 C: digital codes that represent the analog signal amplitude.表示模拟信号幅值的数字代码。 D: digital codes that represent the time of each sample.表示每次采样时间的数字代码。

在Audition CS6 中，“Effects→Amplitude and Compression →Amplify”菜单命令的作用是（

在Audition CS6 中，“Effects→Amplitude and Compression →Amplify”菜单命令的作用是（ ）

超声波焊接机的“焊接时间”为（） A: DelayTime B: HoldTime C: WeldTime D: Amplitude

Which of the following is not the main limitation of optical transmission signals . A: eye opening B: pulse overshoot C: undershoot limitations D: amplitude

failure under variable amplitude stress cycles is assessed using Miner’s rule. A: fatigue B: break C: compressive D: bending

When a phase winding of a resolver carries alternating current, the amplitude of magnetic density at each point in the air-gap is produced by the winding changes in ______ distribution at certain instant.

很多控制器的输出都有可能产生振铃现象。振铃幅度RA (Ringing Amplitude) 可用来衡量振铃强烈的程度，与采样周期有很大的关系。