单项选择题
Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.
A.the Canadian Coast Guard
B.Ice Sarnia
C.the Ice Navigation Center
D.the icebreaker assigned to the area
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相关考题
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单项选择题
Coiling new rope against the lay，bringing the lower end up through the center of the coil，then coiling with the lay，in order to remove the kinks，is known as（）.
A.coiling
B.faking
C.flemishing
D.thoroughfooting -
单项选择题
Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
A.pilot charts
B.Notices to Mariners
C.Tide Tables
D.Current Tables -
单项选择题
Clouds with the prefix “nimbo” in their name（）.
A.are sheet or layer clouds
B.have undergone great vertical development
C.are middle or high altitude clouds
D.are rain clouds
