South Korea’s largest mobile phone operator is to offer users a new service that it says will repel mosquitoes and subscribers c

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问题 South Korea’s largest mobile phone operator is to offer users a new service that it says will repel mosquitoes and subscribers can download a sound wave that is______to human ears but annoys mosquitoes within a range of about a metre.

选项 A、audibility
B、inaudibility
C、audible
D、inaudible

答案D

解析 句意:韩国最大的手机经营商即将向消费者提供一项新的服务——驱除蚊子,订阅者可以下载一种声波,这种声波人类听不到但是可以驱逐附近一米范围内的蚊子。inaudible是形容词,意为“听不见的",符合句意。因此D选项正确。
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