density differences of the water
rotation of the earth
direction of primary circulation of air
all of the above
第1题：
For full information regarding the current circulation of the Indian Ocean，______ Sailing Direction，Current Atlas，etc．
A.watch
B.look for
C.see
D.regard
第2题：
FLOATING ， CAUSED BY WINDS AND CURRENT WITH A DETERMINABLE DIRECTION defines______．
A.Floating
B.Sailing
C.Running into danger
D.Drifting
第3题：
The navigational term Set of current means ______.
A.velocity of current in knots
B.direction from which the current flows
C.estimated current
D.direction toward which the current flows
第4题：
Britain’s climate is influenced by（）,a warm ocean current that passes the western coast of the British Isles and warms them.
第5题：
第6题：
A tsunami is caused by a(n) ______.
A.tidal wave
B.storm surge caused by a hurricane or tropical storm
C.earthquake on the ocean's floor
D.tornado
第7题：
第8题：
On a voyage from Halifax，N.S.，to Dakar，West Africa，the Canary Current will ______.
A.set the vessel to the left
B.set the vessel to the right
C.offer resistance in the form of a head current
D.furnish additional thrust in the form of a fair or following current
第9题：
海（洋）流（ocean current）
第10题：
假设创建了一个侦听器listner1，在侦听器命令行工具中将其设置为当前侦听器，可以使用如下（）命令。