航海英语航海通告与警告单项选择题每日一练(2018.11.12)

单项选择题
Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by（）.
A.Notices to Mariners
B.Sailing Directions
C.List of Lights and Signals
D.Guide to Port Entries
单项选择题
Chart legends which indicate a conspicuous landmark are printed in（）.
A.capital letters
B.italics
C.boldface print
D.underlined letters
单项选择题
Which would influence a magnetic compass（）.
A.Electrical wiring
B.Iron pipe
C.Radio
D.All of the above
单项选择题
What is the significance of the broken magenta lines which roughly parallel the shore between Roanoke Point and Orient Point on Long Island（）.
A.They mark the limits of breakers in that area
B.These lines warn the mariner of submerged rocks
C.They mark the boundary lines of fish trap areas
D.These lines warn the mariner of submerged pipelines
单项选择题
The height of a tide can be increased by（）.
A.A storm surge
B.A high pressure area
C.The jet stream
D.A cold front