题目内容

Of all the extinguishing agents listed below，which one has the greatest capacity for heat

A. Water fog
B. Carbon dioxide
C. Dry chemical
D. Solid stream of water

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Our ship is ________ take additional cargo in three ports on her way home．

A. pay attention to
B. planned to
C. in order to
D. have to

Periodic publications notifying changes in，or additions to，previously published navigational data is ________ ．

A. Supplements
B. Annual Summary
C. Navigational Warnings
D. Notice to Mariners

In restricted visibility the safe speed of a vessel without operational radar may be ________ enable effective avoiding action to be taken on sighting another ship．

A. too low to
B. too high to
C. too high for
D. too low for

Halogenated hydrocarbon， Halon in short form，is used on board ship as ________ ．

A. fire-extinguishing medium
B. a standard fire test
C. a non-combustible material
D. a fire main