单项选择题

The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.

A.Mayday
B.Pan
C.Safety
D.Interco

相关考题

The radiotelegraph alarm signal is（）.A.SOS sent three t...

单项选择题The radiotelegraph alarm signal is（）.

A.SOS sent three times
B.ten one-second dashes with a four-second interval between them
C.twelve four-second dashes with a one-second interval between them
D.twelve one-second dashes with a short interval between them

The expression FIRST MAGNITUDE is usually used to refer...

单项选择题The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.

A.1.5 and greater
B.1.25 and greater
C.1.0 and greater
D.0.5 and greater

The expression DROP ANCHOR means（）.A.hold anchorB.leave...

单项选择题The expression DROP ANCHOR means（）.

A.hold anchor
B.leave anchor
C.let go anchor
D.weigh anchor

紧急用语

The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.