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When patching holes in the hull of a ship，pillows，bedding，and other soft materials can be used as ______．
A.caulking
B.gaskets
C.strongbacks
D.wedges
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更多 “ When patching holes in the hull of a ship，pillows，bedding，and other soft materials can be used as ______．A.caulkingB.gasketsC.strongbacksD.wedges ” 相关考题
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All the following is true except that ______．A.in many places a counter current flows in opposition to the main current close to the bankB.current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the windC.as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructionsD.when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces
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B1i'k Holes1 Black holes can be best described as a sort of vacuum,sucking up everything in space. Scientists have discovered that black holes come from an explosion of huge stars. Stars that are near death can no longer burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force, hydrogen ends up putting pressure onto the star' s surface until it suddenly explodes then collapses.2 Black holes come from stars that are made of hydrogen,other gases and a few metals. When these explode it can turn into a stellar-mass ( 恒星质量）black hole , which can only occur if the star is large enough (should be bigger than the sun) for the explosion to break it into pieces,and the gravity starts to compact every piece into the tiniest particle. Try to see and compare:if a star that' s ten times the size of the sun endsup being a black hole that' s no longer than 70 kilometers ,then the Earth would become a black hole that' sonly"fraction of an inch! 3 Objects that get sucked in a black hie will always remain there,never to brsak fren. But rememberthat black holes can only gobble up（吞噬）objects within a specific distance to it It' s possible for a largestar near the sun to become a black hole,but the sun will continue to stay in place. Orbits (轨道）do notchange because the newly formed black hole, contains exactly the same amount of mass as when it was a star,only this time its mass is totally contracted that it can end up as on biggeer tnan a state. 4 So far, astronomers have figured out that black holes exist because of Albert Einstenin's theory of relativity. In the end,through numerous studies ,they have discovered that black holes truly exist. Since blackholes trap light and do not give off light,it is nearly impossible to detect black goles via a telescope. Butastronomers continue to study galaxies (银河系）,space and the solar system to understand how black holes misht evolve. It is possible that black holes can exist for millions of years,and later contribute to a biggerprocess in galaxies ,which can eventually lead to creation of new entities（实体）.Scientists also credit blackholes as helpful in learning how galaxies began to form. Paragraph 2_____________A:What Happens to the Objects Around a Black Hole?B:Is There Proof That Black Holes Really Exist? C:How Were Black Holes Named? D:What Are Different Types of Black Holes?E:What Are Black Holes Made of?F:How Are Black Holes Formed?
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Black Holes1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough (should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S only a fraction of an inch!3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not change because the newly formed black hole contains exactly the same amount of mass as when it was a star, only this time its mass is totally contracted that it can end up as no bigger than a state.4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black holes as helpful in learning how galaxies began to form.When a large star explodes,the gravity compacts every piece into______.A:the existence of black holesB:the creation of new entitiesC:the same amount of massD:an fraction of an inchE:a fraction of an inchF:the tiniest particle
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Black Holes1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough (should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S only a fraction of an inch!3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not change because the newly formed black hole contains exactly the same amount of mass as when it was a star, only this time its mass is totally contracted that it can end up as no bigger than a state.4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black holes as helpful in learning how galaxies began to form.Albert Einstein's theory of relativity helps to prove__________.A:the existence of black holesB:the creation of new entitiesC:the same amount of massD:an fraction of an inchE:a fraction of an inchF:the tiniest particle
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Black Holes1 Black holes can be best described as a sort of vacuum,sucking up everything in space.Scientists have discovered that black holes come from an explosion of huge stars.Stars that are near death can no longer burn due to loss of fuel , and because its temperature can no longer control the gravitational（重力的）force,hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.2 Black holes come from stars ihat are made of hydrogen,other gases and a few metals.When these explode it can turn into a stellar-mass（恒星质量) black hole , which can only occur if the star is large enough (should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact every piece into the tiniest particle.Try to see and compare:if a star that's ten times the size of the sun ends up being a black hole that's no longer than 70 kilometers,then the Earth would become a black hole that'S only a fraction of an inch!3 Objects that get sucked in a black hole will always remain there,never to break free.i1it remember that black holes can only gobble up（吞噬）objects within a specific distance to it.It's possible for a large star near the sun to become a black hole,but the sun will continue to stay in place.Orbits（轨道）do not change because the newly formed black hole contains exactly the same amount of mass as when it was a star, only this time its mass is totally contracted that it can end up as no bigger than a state.4 Sofar,astronomers have figured out that black holes exist because of Albert Einstcin's theory of relativity.In the end,through numerous studies,they have discovered that black holes truly exist.Since black holes trap light and do not give off light,it is nearly impossible to detect black holes via a telescope.But astronomers continue to study galaxies（银河系）, space and the solar system to understand how black holes might evolve.It is possible that black holes can exist for millions of years,and later contribute to a bigger process in galaxies,which can eventually lead to creation of new entities（实体）.Scientists also credit black holes as helpful in learning how galaxies began to form.Black holes are formed after_________.A:the existence of black holesB:the creation of new entitiesC:the same amount of massD:an fraction of an inchE:a fraction of an inchF:the tiniest particle
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In which two aspects does hot patching differ from conventional patching？（） A、 It consumes more memory compared with conventional patching.B、 It can be installed and uninstalled via OPatch unlike conventional patching.C、 It takes more time to install or uninstall compared with conventional patching.D、 It does not require down time to apply or remove unlike conventional patching.E、 It is not persistent across instance startup and shutdown unlike conventional patching.
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单选题All the following is true except that（）.A
in many places a counter current flows in opposition to the main current close to the bankB
current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the windC
as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructionsD
when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces
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单选题The object of plugging holes below the waterline on a ship should be to（）.A
eliminate all water entering the holeB
only plug holes in machinery or other vital spacesC
reduce the entry of water as much as possibleD
plug the largest holes first
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单选题If the buoyant force on a ship’s hull is equal to the displacement tonnage，the ship will（）.A
require ballastB
be down by the headC
sinkD
float
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单选题According to Annex Ⅴ of MARPOL 73/78, the dunnage, lining and packing materials which will float can be discharged when the ship is more than（）away from the nearest land.A
3 n mileB
5 n mileC
12 n mileD
25 n mile
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单选题Our ship has not been to shipyard for a long time, the fouling on the ship’s hull greatly decreases her（）.A
resistanceB
weightC
speedD
displacement
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单选题（）is applied to the area of the ship’s hull which is out of water when the ship is loaded.A
Boottopping paintB
Topside paintC
Bottom paintD
Primer
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单选题What additional precautions should be taken when making temporary repairs to a ship that is operating when hydrogen sulfide is present?（）A
Seal off all tank and compartment ventilationB
Remove all bulk materials from the P-tanksC
Provide respiratory protection and monitoringD
All of the above
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单选题In plugging submerged holes on a vessel，rags，wedges，and other materials should be used in conjunction with plugs to（）.A
reduce the water pressure on the hullB
reduce the water leaking around the plugsC
prevent progressive floodingD
reduce the possibility of stress fractures
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单选题The apparent wind can be zero when the true wind is from（）.A
ahead and equal to the ship's speedB
astern and equal to the ship's speedC
ahead and equal to twice the ship's speedD
astern and equal to twice the ship's speed
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单选题If the buoyant force on a ship’s hull is equal to the displacement tonnage, the ship cause（）.A
require ballastB
be down by the headC
sinkD
float
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单选题The word “critical” in the sentence “This is a critical period as any loss of propulsion, or steering, can lead to collision, grounding, or other damage to the ship” can be best replaced by （）.A
dangerousB
bestC
badD
important
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单选题（），where the ship is docked for hull coating renewal, and for any other required underwater work to be carried out, when the opportunity is taken to make other repairs.A
Voyage repairsB
Routine dockingC
Damage repairsD
Conversion
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填空题What can visitors do when they find materials on the website inaccurate?They can send their comments to ____.
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单选题When used with reversing reduction gears, medium-speed diesel engines should be bolted to their foundations with fitted bolts at the drive end and clearance(loosely fitted) bolts in other locations √This is done to （）A
maintain alignment when the ship’s hull is working in heavy seasB
ensure engine vibrations correspond to the natural frequency of the hullC
permit the engine to expand away from the driven equipment as the engine heats up and expandsD
maintain engine thrust bearing clearances
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单选题A ship can request completion of a （） when the ship is at a higher security level than the port facility or another ship it is interfacing with.A
DOCB
DOSC
SSPD
SMC
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单选题Seat belts can make us safer because _____.A
we are interested in themB
they can stop us from hitting other carsC
they can help us stay safely on the seatsD
they are made of strong materials
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填空题There are a lot of materials which can be used for making paper, but the superiority ones are soft wood, cotton and rags.____
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单选题The athwartship hull structural members of a ship are（）.A
stringersB
girdersC
breasthooksD
deck beams
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