单项选择题

SWEEP INT on radar panel is the abbreviation of（）.

A.sweep introduction
B.sweep interest
C.sweep intention
D.sweep intensity

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单项选择题

A.all fishing vessels over 39 feet in length
B.sail-propelled fishing vessels
C.all fishing vessels of less than 200 GT
D.wooden hull fishing vessels with a poor radar echo

单项选择题

Radar makes it possible and much safer for us to sail（）.

A.in dense fog
B.in boisterous weather
C.in the open sea
D.in rivers

单项选择题

Radar beacons are transmitters designed to produce a（）on the screens of ship’s radar sets.

A.incorrect image
B.distinctive image
C.pictorial image
D.pictographic image