()willbebroadcasteveryonehouronVHFChannel6.
A. VHFnews
B. Channelrules
C. Visibilitytime
D. Navigationalwarnings
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()orlossofcontents.
A. No
B. R
C. P
D. N/R
为使纵拉杆在受到各向冲击力时都有一个弹簧起缓冲作用,两端的弹簧装在球头销的()。
A. 两侧
B. 同一侧
C. 内侧
D. 外侧
()behalfofmyowners,Igiveyoumyformalnotice.
At
B. On
C. Of
D. In
()anumberofhome-madenauticalinstrumentsandforeign-mademetersonthebridge.
A. Have
B. Has
C. Thereis
D. Thereare