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
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 ice
B.Both icebergs and sea ice will move in approximately the same direction and at the same speed
C.Icebergs and sea ice will move in the same direction，but at different speeds due to the sail effect of the berg
D.Icebergs and sea ice will move in the same direction，but the iceberg will move slower because of its underwater bulk
相关考题：
Which of the following statement is NOT true?A. When you run out of money, you can ask your partner to call back.B. Telephone books in the US have different colors.C. The state of Oregon has several area codes.D. An area code is necessary in making a long-distance call.
Which statement is TRUE concerning protection of double bottom tanks against excessive pressure?A.Each vent for the tank must be equal to the area of the tank filling lineB.The tanks must be protected by overflowsC.The total area of the vents or the overflow shall be at least equal to the area of the fill lineD.There must be twice as much vent area as the area of the fill line
Which statement about ships operating in ice is FALSE ________．A.Light and partly loaded ships should be ballasted as deeply as possibleB.In brash-filled channels，operating with a shallow draft forward is most effectiveC.Traditionally，operating ships light in the ice has been effective in the springD.Good searchlights should be available in the event of night navigation with or without icebreaker escort
______ is an area within the radiotelephone coverage of at least one VHF coast station in which continuous Digital Selective Calling is available．A.Sea Area A1B.Sea Area A2C.Sea Area A3D.Sea Area A4
请阅读短文，完成此题。When we analyze the salt salinity(盐溶度 ) of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas ofhigh rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by-evaporation, or decreased by the addition of fresh water by precipitation.Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.The purpose of mentioning the Weddell Sea is__________.查看材料A．to give an example of cold-water salinityB．to point out the location of deep watersC．to make a comparison between hot-water salinity and cold-water salinityD．to show that the water in the Weddell Sea varies in salinity from place to place
请阅读短文，完成此题。When we analyze the salt salinity(盐溶度 ) of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas ofhigh rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by-evaporation, or decreased by the addition of fresh water by precipitation.Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.Which of the following is not the cause of the decrease in the oceanic salinity?查看材料A．Precipitation.B．Rain and snow.C．Formation of ice.D．Addition of water by rivers.
请阅读短文，完成此题。When we analyze the salt salinity(盐溶度 ) of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas ofhigh rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by-evaporation, or decreased by the addition of fresh water by precipitation.Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.It can be known from the passage that increase in the salinity of ocean water is caused by__________.查看材料A．melting of sea iceB．precipitationC．evaporationD．supplement of salt
请阅读短文，完成此题。When we analyze the salt salinity(盐溶度 ) of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas ofhigh rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by-evaporation, or decreased by the addition of fresh water by precipitation.Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.Which of the following statements is TRUE according to the passage?查看材料A．Oceanic salinity has great effect on sea life.B．Many factors combine to cause changes in oceanic salinity.C．The movement of the water is related to the amount of salt.D．The temperature of the water has much to do with the oceanic salinity.
请阅读短文，完成此题。When we analyze the salt salinity(盐溶度 ) of ocean waters, we find that it varies only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the subtraction of water from the ocean by means of evaporation. In this manner, the salinity is increased, since the salt stays behind. If this is carried to the extreme, of course, white salt would be left behind; this, by the way, is how much of the table salt we use is actually obtained.The opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. Here the ocean is being diluted so that the salinity is decreased. This may occur in areas ofhigh rainfall or in coastal regions where rivers flow into the ocean. Thus salinity may be increased by the subtraction of water by-evaporation, or decreased by the addition of fresh water by precipitation.Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. Similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.A third process by which salinity may be altered is associated with the formation and melting of sea ice. When seawater is frozen, the dissolved materials are left behind. In this manner, seawater directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. Of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.In the Weddell Sea, the densest water in the ocean is formed as a result of this freezing process, which increases the salinity of cold water. This heavy water sinks and is found in the deeper portion of the oceans of the world.This passage mainly tells us about__________.查看材料A．the analysis of the salinity of ocean watersB．the causes of the variation in oceanic salinityC．the importance of the changes in oceanic salinityD．the different forms of salts in ocean waters
Which two statements are true about bandwidth guarantee？（）A、When congestion is present，the priority command doesn’t allow exceeding the allocated rateB、When congestion isn’t present，the priority command doesn’t allow exceeding the allocated rateC、When congestion is present，the priority command allows exceeding the allocated rateD、When congestion isn’t present，the priority command allows exceeding the allocated rate
In JUNOS software, which statement is true regarding the OSPF advertisement of the loopback IP address on the ABR?（）A、When Area 0 is active, the loopback interface must be configured in OSPF for it to be advertised.B、When Area 0 is active, the loopback address is automatically advertised into other areas.C、When Area 0 is active, the OSPF router-id must match the loopback address for the loopback address to be advertised.D、When Area 0 is active, the router-id must be configured for the loopback address to be advertised.
Which statement is true regarding the Junos OS?（）A、The Junos kernel is based on the Solaris operating sytemB、The Junos kernel is based on the GNU Zebra operating systemC、The Junos kernel is completely original and not based on any other operating systemD、The Junos kernel is based on the FreeBSD UNIX operating system
Which statement is true regarding the Junos OS?（）A、The Junos kernel is based on the Solaris operating system.B、The Junos kernel is based on the GNU Zebra operating system.C、The Junos kernel is completely original and not based on any other operating system.D、The Junos kernel is based on the FreeBSD UNIX operating system.
The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance. Which statement is true while performing a tape backup in an RMAN session?（）A、The tape I/O performed is asynchronousB、The tape buffer is allocated from the System Global Area (SGA)C、The tape buffer is allocated from the Program Global Area (PGA)D、Oracle I/O uses an interrupt mechanism to determine when each I/O completes
Which statement is true about the UNDO_RETENTION parameter when retention guarantee is notenabled（）A、It is the time period after which the undo data becomes obsolete.B、It is the time period after which the committed undo data would be transferred to a temporarytablespace.C、It is the minimum time period up to which the committed undo data would be retained if free undo spaceis available.D、It is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.
单选题Evaluate the following statement： Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement？（）A They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.B They are evaluated by the first WHEN clause. If the condition is true， then the row would be evaluated by the subsequent WHEN clauses.C They are evaluated by the first WHEN clause. If the condition is false， then the row would be evaluated by the subsequent WHEN clauses.D The INSERT statement would give an error because the ELSE clause is not present for support in case none of the WHEN clauses are true.
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According to the passage, which of the following is true of the ratios of oxygen isotopes in ocean sediments?AThey indicate that sediments found during an ice age contain more calcium carbonate than sediments formed at other times.BThey are less reliable than the evidence from rocks on land in determining the volume of land ice.CThey can be used to deduce the relative volume of land ice that was present when the sediment was laid down.DThey are more unpredictable during an ice age than in other climatic conditions.EThey can be used to determine atmospheric conditions at various times in the past.
单选题When evacuating a seaman by helicopter lift，which statement is TRUE?（）AEvacuation should be from an area forward of the bridgeBThe vessel should be slowed to bare steeragewayCIf the hoist is at the stern，booms extending aft at the stern should be cradled with the topping lifts hove tautDThe litter should not be touched until it has been grounded
单选题Which statement is true regarding the Junos OS?（）AThe Junos kernel is based on the Solaris operating system.BThe Junos kernel is based on the GNU Zebra operating system.CThe Junos kernel is completely original and not based on any other operating system.DThe Junos kernel is based on the FreeBSD UNIX operating system.
单选题Which statement is true regarding the Junos OS?（）AThe Junos kernel is based on the Solaris operating systemBThe Junos kernel is based on the GNU Zebra operating systemCThe Junos kernel is completely original and not based on any other operating systemDThe Junos kernel is based on the FreeBSD UNIX operating system
单选题An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）AOpen-faced diamondBDiamond with a crossCCircleDRectangle
单选题Which statement is true about the UNDO_RETENTION parameter when retention guarantee is notenabled（）AIt is the time period after which the undo data becomes obsolete.BIt is the time period after which the committed undo data would be transferred to a temporarytablespace.CIt is the minimum time period up to which the committed undo data would be retained if free undo spaceis available.DIt is the time period after which the undo data is transferred to the Flash Recovery Area to provide readconsistency.
单选题The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance. Which statement is true while performing a tape backup in an RMAN session?（）AThe tape I/O performed is asynchronousBThe tape buffer is allocated from the System Global Area (SGA)CThe tape buffer is allocated from the Program Global Area (PGA)DOracle I/O uses an interrupt mechanism to determine when each I/O completes
单选题Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）AEach vent for the tank must be equal to the area of the tank filling lineBThe tanks must be protected by overflowsCThe total area of the vents or the overflow shall be at least equal to the area of the fill lineDThere must be twice as much vent area as the area of the fill line
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.