At the sight of the _____ scene, he was almost _____ to death.

A．frightened；frightened

B．frightening；frightened

C．frightening；frightening

D．frightened；frightening

人们说话时发出的语音信号必须经过数字化才能由计算机进行存储、处理和传输。语音信号的带宽为300～3400Hz，若取样频率为8kHz、量化精度为8位，则经过数字化之后每小时的数据量(未压缩时)大约是

A．230MB

B．115MB

C．461MB

D．29MB