單項(xiàng)選擇題A stretch where the channel changes from one side of the river to the other is called a （）.

A.bifurcation
B.transit
C.crossing
D.changeover


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1.單項(xiàng)選擇題A storm’s track is characterized by all of the following except（）.

A.the direction the storm has come from
B.the direction in which the storm is moving
C.the speed at which the storm is moving
D.the path taken by the storm

2.單項(xiàng)選擇題A stand-on vessel is（）.

A.required to give way in a crossing situation
B.required to sound the first passing signal in a meeting situation
C.free to maneuver in any crossing or meeting situation as it has the right-of-way
D.required to maintain course and speed in a crossing situation but may take action to avoid collision

3.單項(xiàng)選擇題A stage should only be rigged（）.

A.over the bow or stern of a vessel
B.over the flat sides of a vessel
C.over the open water
D.over the dockside

4.單項(xiàng)選擇題A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.

A.replaced in its proper location if weight loss is no more than 15%
B.replaced in its proper location if weight loss is no more than 25%
C.labeled empty and recharged as soon as possible
D.labeled empty and replaced in its proper location regardless of weight

5.單項(xiàng)選擇題A special daymark is a（）.

A.red-and-white octagon
B.daymark with a yellow stripe on it
C.green square
D.yellow diamond