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單項選擇題

Two vessels（）while they „re sailing in Huangpu River.

A.strike
B.strikes
C.are striking
D.struck

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單項選擇題

（）all ships in a large sea area being alerted, an “area call” will normally be transmitted so that only those ships in the vicinity of the distress incident are alerted.

A.Avoiding
B.To be avoided
C.Avoided
D.To avoid

單項選擇題

The concept of NAVTEX is of a（）system for the broadcast and reception of MSI.

A.complete service
B.partial controlled
C.quite new
D.total co-ordinated