Wireless audio-output connections typically use Bluetooth technology.
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Multifunctional devices (MFDs) are used to capture as well as play back recorded sounds.
A. 对
B. 错
Telephony, also known as Internet telephony, is the VoIP application that uses the Internet rather than traditional telephone lines to support voice communication.
A. 对
B. 错
Skype provides audio and video service that requires the installation of special hardware and software.
A. 对
B. 错
Unmanned aerial vehicles (UAV) are too expensive for anything but military budgets.
A. 对
B. 错