航海英语航海学基本知识单项选择题每日一练(2019.01.21)

单项选择题
An orange and white buoy marking a danger area will have what symbol on it?（）
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
单项选择题
A light that has a light period shorter than its dark period is described as（）.
A.flashing
B.pulsating
C.occulting
D.alternating
单项选择题
How is the intensity of a light expressed in the Light Lists?（）.
A.Luminous range
B.Geographic range
C.Nominal range
D.Meteorological range
单项选择题
A yellow buoy may exhibit a(n)（）.
A.fixed red light
B.flashing light
C.white light
D.occulting light
单项选择题
（）is the distance east or west measured in degrees，minutes and seconds of arc on the equator between the prime meridian and the meridian passing through the place.
A.Longitude
B.Latitude
C.Height
D.Bearing