單項選擇題If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the northern hemisphere?（）.

A.East to northeast
B.East to southeast
C.North to northwest
D.South to southeast


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1.單項選擇題In 1979 an extensive（）program was in progress throughout Suez Canal.

A.a dredge and widen
B.dredged and widened
C.dredging and widening
D.being dredging and widening

2.單項選擇題In a crossing situation on international waters, a short blast by the give-way vessel indicates that the vessel（）.

A.is holding course and speed
B.is turning to starboard
C.intends to pass port to port
D.will keep out of the way of the stand-on vessel

3.單項選擇題In a crossing situation on open waters, a sailing vessel shall keep out of the way of all the following vessels except a vessel（）.

A.not under command
B.restricted in her ability to maneuver
C.engaged in towing
D.fishing

4.單項選擇題In a crossing situation,the vessel which has the other on her own starboard side shall（）.

A.if the circumstances of the case admit, avoid crossing ahead of the other
B.change course to port to keep out of the way
C.overtaking another
D.All of the above

5.單項選擇題In a narrow channel, a signal of intent which must be answered by the other vessel, is sounded by a vessel（）.

A.meeting another head-on
B.crossing the course of another
C.overtaking another
D.Any of the above