系统中用来广播和乘客娱乐的部分，包括放大器、扬声器、手持话筒、扬声器、控制面板等。<p><br></p>

A、

That portion of the system used to address and entertain the passengers. Includes items such

as amplifiers, speakers, handsets, reproducers, control panels

 That portion of the system used to broadcast and passengers player. Includes items such as amplifiers, speakers, handsets, reproducers,econtrol panels,

That portion of the system used to address and entertain the passengers. Includes items such

as amplifiers, horn, hand microphone,reproducers, control panels,