The international regulations for preventing collision at sea 1972 shall apply to ___ upon the high seas and in all waters connected therewith navigable by seagoing vessels. A. some vessels B. all vessels C. all vessels except sailing vessels D. all vessel not less than 20 meters in length

单选题

“PAN” is the international RTF__________signal.

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单选题

“MAYDAY” is the international RTF signal.

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单选题

The number code of Aeroflot Russian International Airlines is( ).

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单选题

According to the international regulation, the playing of the national anthem _____ all sports events.

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问答题

Analyse the morphological structures of the following words and point out the types of the morphemes.?unbearable, international, ex-prisoner.

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