163. 發射型式所需頻寬，由窄至寬依序為何？
(A) RTTY, CW, SSB voice, FM voice
(B) CW, FM voice, RTTY, SSB voice
(C) CW, RTTY, SSB voice, FM voice
(D) CW, SSB voice, RTTY, FM voice

答案：登入後查看
統計： A(0), B(1), C(2), D(0), E(0) #829199