6．飛機 VHF control panel 做為：
(A)調頻率‧Frequency tuning.
(B)通話‧Interphone.
(C)供應電力‧ Power supply.
(D)發報機‧Radio transmitting.

答案：登入後查看
統計： A(1), B(0), C(0), D(0), E(0) #2087150