A.at all times
B.during evening hours
C.unless another person is present
D.during drilling operations
您可能感興趣的試卷
你可能感興趣的試題
A.shall
B.should
C.may
D.would
A.of
B.to
C.on
D.with
A.to
B.on
C.of
D.for
A.urgency or an emergency
B.the vessel's national identity signal
C.a group from the general signal code
D.a group from the medical signal code
A.Hard rubber
B.Canvas
C.Leather
D.Sponge rubber
最新試題
Geographic range is the maximum distance at which a light may be seen under（）.
The winch at Hatch No.3 is（）trouble.
Which method is used to detect rot in manila lines?（）
The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.
Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.
Where would you find the call sign or call letters of the radio station on your ship?（）
Which may ignite fuel vapors?（）
Which statement is TRUE about placing the eyes of two mooring lines on the same bollard?（）
I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair.
In the International Code of signals，a group of three letters indicates（）.