單項(xiàng)選擇題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


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1.單項(xiàng)選擇題Proper use shall be made()radar equipment.

A.with
B.to
C.for
D.of

2.單項(xiàng)選擇題No assumptions()on the basis of scanty information,especially scanty radar information.

A.should not be made
B.are not to be taken
C.should be taken
D.shall be made

3.單項(xiàng)選擇題My radar is not working.I require shore based radar assistance.Is shore based radar assistance()?

A.used
B.available
C.in use
D.can be used

4.單項(xiàng)選擇題It may be found that,in certain circumstances,radar beacon emissions can cause()with the normal radar display,particularly at close range.

A.unwanted interference
B.unexpected figures
C.abnormal data
D.unwanted information