A.which
B.on which
C.at which
D.in which
您可能感興趣的試卷
你可能感興趣的試題
A.it necessary
B.it is necessary
C.it necessary to
D.necessary
A.depend on
B.depending on
C.dependent on
D.depended on
A.exchange
B.to exchange
C.exchanging
D.exchanged
A.adherence to
B.adoption to
C.relaying on
D.usage of
A.keep silence
B.forbid transmission
C.change information
D.impose
最新試題
All coast radio stations（）DSC installed for VHF and HF.
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
Radio communication（）for many years and helps to save tens of thousands of lives.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
The priority of EGC messages is classified by（）.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Monitoring is especially important in a highly automated system which is dependent on careful（）procedure and format.
On-scene communications will normally take place between（）.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.