在职攻硕英语考试

根据网考网考试中心的统计分析，以下试题在2019/7/7日在职攻硕英语习题练习中，答错率较高，为：48%
【单选题】The deep-sea listening system makes use of______.


A．the sophisticated technology of focusing sounds under water
B．the capability of sound to travel at high speed
C．the unique property of layers of ocean water in transmitting sound
D．low-frequency sounds travelling across different layers of water