A、Asynchronous balanced mode
B、Unbalanced asynchronous response mode
C、Non-equilibrium normal response mode
D、A, B, C
喵查答案：Asynchronous balanced mode
Among the common operation modes in HDLC, which one can start the transmission process by both the master station and the slave station?
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Generally speaking, the higher the sound quality is required, the higher the quantization level and the lower the sampling frequency is. -
The higher the sampling frequency, the closer the discrete digitized sound wave is to its original waveform. -
Audio files in WAV format do not use compression algorithm, so they have good sound restorability, strong stereoscopic impression and relatively large file capacity. -
MPEG video compression standards include MPEG-1, MPEG-2, MPEG-4, MPEG-7 and MPEG-21.
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