单选题A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines（）.ATowing operationsBRigid coupled towingCClose coupled towingDHard coupled towing
单选题
A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines（）.
A
Towing operations
B
Rigid coupled towing
C
Close coupled towing
D
Hard coupled towing
参考解析
解析：
暂无解析
相关考题：
In cold, damp weather, the buildup of ice on airplane wings can pose significant aerodynamic problems. Which of the following effects would you expect?A.As ice builds up on the top of the wing, drag increases.B.As ice builds up on the top of the wing, lift increases.C.As ice builds up on bottom of the wing, lift decreases.D.All of the above
Huge solar mirrors are put in orbit around Mars to ___ the polar ice－caps. A、warmB、heatC、heatenD、enheat
_____ ice cream in the world is more delicious than American ice cream.A: NoneB: NeitherC: NotD: No
When operating in an area where sea ice and icebergs are present，which statement is TRUE ________．A.Icebergs may travel in a direction many degrees different from the sea iceB.Both icebergs and sea ice will move in approximately the same direction and at the same speedC.Icebergs and sea ice will move in the same direction，but at different speeds due to the sail effect of the bergD.Icebergs and sea ice will move in the same direction，but the iceberg will move slower because of its underwater bulk
You are on an ice-reinforced vessel about to enter packice．You should ______．A.enter the pack on the windward side where there is a well defined ice edgeB.trim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcementC.take maximum advantage of coastal leads caused by offshore windsD.look for areas of rotten ice and enter perpendicular to the ice edge
In ice of higher concentrations ______ is not one of the basic applying rules．A.keep movingB.try to work with the ice movement，and not against itC.excessive speed means ice damageD.use full astern as often as possible
A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines ______.A.Towing operationsB.Rigid coupled towingC.Close coupled towingD.Hard coupled towing
共用题干第一篇Arctic MeltEarth’s North and South Poles are famous for being cold and icy.Last year,however,the amnount of ice in the Arctic Ocean（北冰洋）fell to a record low.Normally,ice builds in Arctic waters around the North Pole each winter and shrinks（缩小）during the summer. But for many years,the amount of ice left by the end of summer has been declining.Since 1979,each decade has seen an 11.4 percent drop in end?of-summer ice cover. Between 1981 and 2000,ice in the Arctic lost 22 percent of its thickness,becoming I.13 meters thinner.Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low,which was set just 2 years ago. This continuing trend has made scientists concerned.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer（海洋学家）at the University of Washington at Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic,leaving a large area of thin ice and open water.Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5℃warmer than average and 1.5℃warmer than the previous record high.With both air and water getting warmer,the ice is melting from both above and below. In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 centimeters by season's end.The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice covcrfrom above,says Donald K. Perovich,a geophysicist at the U.S.Army Cold Regions Researchand Engineering Laboratory in Hanover,N.H.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.By the end of summer 2007 the ice cover in the Arctic was ________.A:4.2 million square kilometersB:11.4 million square kilometersC:1.13 million square kilometers D:38 million square kilometers
共用题干第一篇Arctic MeltEarth’s North and South Poles are famous for being cold and icy.Last year,however,the amnount of ice in the Arctic Ocean（北冰洋）fell to a record low.Normally,ice builds in Arctic waters around the North Pole each winter and shrinks（缩小）during the summer. But for many years,the amount of ice left by the end of summer has been declining.Since 1979,each decade has seen an 11.4 percent drop in end?of-summer ice cover. Between 1981 and 2000,ice in the Arctic lost 22 percent of its thickness,becoming I.13 meters thinner.Last summer,Arctic sea ice reached its thinnest levels yet.By the end of summer 2007,the ice had shrunk to cover just 4.2 million square kilometers.That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low,which was set just 2 years ago. This continuing trend has made scientists concerned.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer（海洋学家）at the University of Washington at Seattle.Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic,leaving a large area of thin ice and open water.Scientists also suspect that fewer clouds cover the Arctic now than in the past.Clearer skies allow more sunlight to reach the ocean.The extra heat warms both the water and the atmosphere.In parts of the Arctic Ocean last year,surface temperatures were 3.5℃warmer than average and 1.5℃warmer than the previous record high.With both air and water getting warmer,the ice is melting from both above and below. In some parts of the Beaufort Sea,north of Alaska and western Canada,ice that measured 3.3 meters thick at the beginning of the summer measured just 50 centimeters by season's end.The new measurements suggest that melting is far more severe than scientists have seen by just looking at ice covcrfrom above,says Donald K. Perovich,a geophysicist at the U.S.Army Cold Regions Researchand Engineering Laboratory in Hanover,N.H.Some scientists fear that the Arctic is stuck in a warming trend from which it may never recover.The Beaufort Sea mentioned in Paragraph 7 is an example to show_________. A:how acetirate the new measurements areB:how thick the ice is in itC:how serious the problem of the ice melt in the Arctic isD:how dangerous it is to travel to it
地面测试机翼防冰系统工作时：（）A、机翼防冰电门必须 AUTO 位，P61板上的WING ANTI-ICE WINDOW/PROBE HEAT电门WING ANTI-ICE 位B、机翼防冰电门必须ON 位，P61板上的WING ANTI-ICE WINDOW/PROBE HEAT电门WING ANTI-ICE 位C、机翼防冰电门必须ON 位，P61板上的WING ANTI-ICE WINDOW/PROBE HEAT电门任意位D、机翼防冰电门必须 OFF 位，P61板上的WING ANTI-ICE WINDOW/PROBE HEAT电门WING ANTI-ICE 位
单选题The purpose of this passage is to ______.Afrighten people with the rapid melting of the Greenland ice sheetBurge people to take some measures to curb the melting of the Greenland ice sheetCpromote people’s environmental protection consciousnessDlet people know the time the Greenland ice sheet will take to melt
单选题In regions where ice conditions prevail in the winter，（）.Athe lantern panes of unattended lights may not become covered with ice or snowBthe lantern panes of unattended lights may become covered with ice or snowCice or snow is likely caused coloredDthe white lights are likely caused to appear colored
单选题Which statement concerning the navigation of a vessel in ice is FALSE?（）AAnchoring in the presence of ice is not recommended except in an emergencyBTowing a vessel through an ice field is not recommended except in an emergencyCThe Free and Proceed system of escorting a beset vessel cuts down on the number of freeing operationsDWhen anchoring in ice，it is advisable to increase the scope of the chain over what is normally used for non-icing conditions
单选题When operating in an area where sea ice and icebergs are present，which statement is TRUE? （）AIcebergs may travel in a direction many degrees different from the sea iceBBoth icebergs and sea ice will move in approximately the same direction and at the same speedCIcebergs and sea ice will move in the same direction，but at different speeds due to the sail effect of the bergDIcebergs and sea ice will move in the same direction，but the iceberg will move slower because of its underwater bulk
单选题An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.AI am altering my course to starboardBI am altering my course to portCI am operating astern propulsionDMy vessel is stopped and making no way through the water
单选题The scientists are not sure_______.Ahow long the ice age lastedBwhere ice sheets melted during the ice ageCwhat caused the temperature changesDwhat the earth is made up of
单选题You are on an ice-reinforced vessel about to enter packice. You should（）.Aenter the pack on the windward side where there is a well defined ice edgeBtrim to an even keel or slightly down by the bow to take maximum benefit of the ice reinforcementCtake maximum advantage of coastal leads caused by offshore windsDlook for areas of rotten ice and enter perpendicular to the ice edge
单选题The ice-skating partners, who were never finishing higher than seventh place, surprised their coaches by finally winning a competition.AThe ice-skating partners, who were never finishing higher than seventh place,BThe ice-skating partners, who had never finished higher than seventh place,CHaving never finished higher than seventh place as ice-skating partners,DThe ice-skating partners never finished higher than seventh place,ENever finishing higher than seventh place, the skating partners has
单选题According to the passage, which of the following statements is TRUE?AStarving polar bears are increasingly coming into villages, where they may be killed either for food or safety.BPolar bears can spend their entire lives on land if the sea ice melts completely.CTwo-thirds of the world's polar bears may disappear by 2050 as global warming continues.DThe growing distance between ice packs is not a problem for polar bears, because they are excellent swimmers.
单选题Where do polar bears usually hunt seals?AOn land.BIn open water.CIn openings in the sea ice.DAt the bottom of the sea.
问答题Scientists have long assumed that most of the ice that melted was in the Northern hemisphere（半球） during the 30,000-year long ice age.
单选题Which of the following is the best title for the passage ?AA computer modelBStudies show ice melted equally in the North and the South during the ice ageCMost of the ice melted in the Northern hemisphere during the 30,000-year long ice ageDA survey result