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单选题
There is actually an overlapped area of（）ocean regions somewhere in Western European waters.
A
two
B
three
C
more than two
D
more than three
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更多 “单选题There is actually an overlapped area of（）ocean regions somewhere in Western European waters.A twoB threeC more than twoD more than three” 相关考题
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According to the passage, which is true about the ocean?A. The waters of the ocean came from rain water.B. The ocean was formed from the, lighter rock materials.C. The vast single ocean formed about 200 million years ago.D. The ocean covered the whole surface of the earth at very beginning.
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What is defined as and area, excluding sea areas A1 and A2, within the coverage of an INMARSAT geostationary satellite in which continuous alerting is available?A.Ocean Area Regions AOR-E, AOR-W, POR or IORB.Sea Area A3C.Sea Area A4D.Coastal and Inland Waters
考题
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?()
A. They are both regions of lowest loss.B. They are both regions of low reflections.C. They are both regions of low index of refraction.D. They are both regions of low chromatic dispersion.E. They are both regions of low Polarization Mode Dispersion (PMD).
考题
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 of
high 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 salinity
B．to point out the location of deep waters
C．to make a comparison between hot-water salinity and cold-water salinity
D．to show that the water in the Weddell Sea varies in salinity from place to place
考题
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 of
high 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.
考题
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 of
high 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 ice
B．precipitation
C．evaporation
D．supplement of salt
考题
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 of
high 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 waters
B．the causes of the variation in oceanic salinity
C．the importance of the changes in oceanic salinity
D．the different forms of salts in ocean waters
考题
（ ）many instances,the people built special temples in which the meteorites were to be worshipped.Meteorite worship was common long ago in the Mediterranean area,and in Africa,India,Japan,and Mexico;such worship still persists in some regions.A.On
B.In
C.About
D.Of
考题
Antarctic differs fundamentally from the Arctic regions.The Arctic is an ocean,（ ）with drifting packed ice and surrounded by the land masses of Europe,Asia,and North America.A.covered
B.filled
C.connected
D.lined
考题
根据下列内容，回答201-205题。
When we analyze the salt salinity(盐浓度) of ocean waters, we find that it varies only slightlyfrom place to place. Nevertheless, some of these small changes are important. There are three basicprocesses that cause a change in oceanic salinity. One of these is the subtraction of water from theocean by means of evaporation. In this manner, the salinity is increased, since the salt stays be-hind. 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 theocean. 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 increasedby the subtraction of water by evaporation, or decreased by the addition of fresh water by precipi-tation.
Normally, in hot regions where the sun is very strong, the ocean salinity is somewhat higherthan it is in other parts of the world where there is not as much evaporation. Similarly, in coastalregions 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 ofsea ice. When seawater is frozen, the dissolved materials are left behind. In thismanner, seawaterdirectly 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 pro-cess, which increases the salinity of cold water. This heavy water sinks and is found in the deeperportion of the oceans of the world.
This passage mainly tells us about___________.A.the analysis of the salinity of ocean waters
B.the causes of the variation in oceanic salinity
C.the importance of the changes in oceanic salinity
D.the different forms of salts in ocean waters
考题
Which area is the most commodities shipped in water transport?（）A、In international deep seaB、In lakesC、In river and canalsD、Coastal ocean
考题
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）A、They are both regions of lowest loss.B、They are both regions of low reflections.C、They are both regions of low index of refraction.D、They are both regions of low chromatic dispersion.E、They are both regions of low Polarization Mode Dispersion (PMD).
考题
单选题Admiralty EasyTide（）.A
has little use for ocean-going marinersB
permits the mariner to select and simultaneously calculate tidal heights for multiple ports for up to seven daysC
includes periods of daylight and nautical twilight，moon phases and a springs and neaps indicatorD
is supplied in the form of a single CD which contains the calculation program and the seven geographic Area Data Sets（ADS）providing global coverage
考题
单选题Mariners should pay much attention in the overlapped area owing to（）.A
complicated circumstancesB
changeable atmospheric pressureC
large density of trafficD
some strong signals from unwanted satellites
考题
单选题The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the（）.A
abyssal plainB
continental shelfC
borderlandD
offshore terrace
考题
单选题Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.A
takenB
takeC
tookD
taked
考题
单选题Why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.A
the weather is always terribleB
the condition there is complicatedC
the signals are too strongD
their SES may receive the signals from unwanted satellite
考题
单选题The drift and set of tidal，river，and ocean currents refer to the（）.A
position and area of the currentB
speed and direction toward which the current flowsC
type and characteristic of the current's flowD
None of the above
考题
单选题There is actually an overlap of（）ocean regions somewhere in Western European Waters.A
as many as threeB
more than twoC
less than twoD
up to four
考题
单选题（）Which area is the most commodity shipped in water transport?A
In international deep seaB
In lakesC
In river and canalsD
Coastal ocean
考题
单选题Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）A
They are both regions of lowest loss.B
They are both regions of low reflections.C
They are both regions of low index of refraction.D
They are both regions of low chromatic dispersion.E
They are both regions of low Polarization Mode Dispersion (PMD).
考题
单选题The satellites over the major ocean regions cover the globe（）.A
besides the polar regionsB
including the North Pole and the South PoleC
above 70°N and below 70°SD
as for north and south as 70°
考题
单选题Ships sailing in（）are able to receive and print out EGC messages.A
a fixed area or Navarea in any ocean regionB
a Navarea or weather forecast areaC
the designated area or given geographic positionD
anywhere of the world
考题
单选题The satellites over the major ocean regions cover the globe（）.A
besides the polar regionsB
including the North Pole and the South PoleC
above 70N and below 70SD
as far north and south 70
考题
单选题One of the causes of ocean currents is density differences in the water. This is true because （）.A
in an area of high density the water's surface is lower than in an area of low densityB
surface water flows from an area of high density to one of low densityC
the lesser the density gradient the freer the water is to moveD
it is the density differences that cause the currents to stay in the troughs
考题
单选题why should the SES operators be very careful when the ship enters the area where three ocean regions overlap? Because（）.A
the weather over there is always terribleB
the condition there is complicatedC
the signals are too strongD
their SES may receive the signals from unwanted satellite
考题
单选题The gap in the ozone hole over the North Pole can expand each summer enough, that it exposes regions as far south as Sweden by heightened UV radiation, also increasing rates of skin cancer in the northern regions by as much as 50 percent.A
that it exposes regions as far south as Sweden by heightened UV radiation, also increasingB
that regions as far south as Sweden have been exposed to heightened UV radiation, as well as having increasedC
to expose regions as far south as Sweden to heightened UV radiation, increasedD
to expose regions as far south as Sweden to heightened UV radiation and increaseE
that exposure to heightened UV radiation in regions as far south as Sweden, as well as increasing
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