單項選擇題A lighthouse can be identified by its（）.

A.painted color
B.light color and phase characteristic
C.type of structure
D.All of the above


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題A lighted preferred-channel buoy may show a（）.

A.fixed red light
B.Morse (A) white light
C.composite group-flashing light
D.yellow light

2.單項選擇題A light that has a light period shorter than its dark period is described as（）.

A.flashing
B.pulsating
C.occulting
D.alternating

3.單項選擇題A light having characteristics which include color variations is defined as（）.

A.switching
B.alternating
C.oscillating
D.fluctuating

4.單項選擇題A light characteristic of composite group flashing indicates that there is a(n)（）.

A.sharp turn in the channel
B.narrowing in the channel at that point
C.junction in the channel
D.obstruction that must be left to port

5.單項選擇題A lateral system buoy displaying a quick light（）.

A.should be passed close aboard on either side
B.indicates that special caution is required
C.is used at a channel bifurcation or junction
D.is painted with red and white vertical stripes