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题目内容
（请给出正确答案）
A.working on 156. 8 MHz
B.being provided with permanently-affixed antenna
C.being watertight
D.being provided with two antennas
答案
D、being provided with two antennas
更多“The followings are all characteristics of portable VHF radiotelephone sets, except __（）”相关的问题
第2题
A.the Inmarsat system
B.VHF, MF and HF DSC systems
C.the COSPAS-SARSAT system
D.AIS systems
第3题
A.In the same direction as the anticipated drift
B.In the opposite direction of the anticipated drift
C.Perpendicular to the line of anticipated drift
D.Downwind
第4题
A.ITU Radio Regulations
B.ALRS （Admiralty List of Radio Signals）Volume 1
C.ALRS （Admiralty List of Radio Signals）Volume 3
D.ALRS （Admiralty List of Radio Signals）Volume 5
