单选题We want such materials ______ can bear high temperature and pressure.AthatBasCwhat Dwhich
单选题
We want such materials ______ can bear high temperature and pressure.
A
that
B
as
C
what
D
which
参考解析
解析：
我们希望这种材料能够经受高温和高压。句子采用such…as…句型，故B项正确。
我们希望这种材料能够经受高温和高压。句子采用such…as…句型，故B项正确。
相关考题：
Why does the author say "we are deprived of the use of our eyes" ?A． People won't use their eyes.B． In traveling at high speed, eyes become useless.C． People can' t see anything on their way of travel.D． People want to sleep during travelling.
Which of the following is Not True?A． Advertisement makes contribution to our pockets and we may know everything.B． We can buy what we want.C． Products of good quality don't need to be advertised.D． Advertisement makes our life colorful.
●A highlevel language is an artificial language with which we can write various (71) .(71) A．filesB．instructionsC．textD．papers
Can we use this material for the decoration of the exhibition hall?A.Yes. Any available material will do for this jobB.Yes. Water-proof material for the decoration of the hall will be used for the interior decorationC.No. Fire-proof materials should be used for the interior decorationD.No. Only highly-cost materials should be used for the interior decoration
We can infer from the passage that____________．A．abstract thinking does not come from physical experiencesB．feelings of warmth and coldness are studied worldwideC．physical temperature affects how we see othersD．capable person are often cold to others
High cylinder firing pressure, accompanied by low exhaust temperature, can result from ___.A.improper fuel rack positingB.lengthy exhaust valve durationC.extend operation at light loadD.excessively early injection timing
We can certainly deliver high-quality education to many students at much()cost.A. lowB. lowestC. lower
The price you quoted is so high that we () help ()this transaction.A、can…to cancelB、can't...cancelingC、can…cancelingD、can't…to cancel
Be sure to finish the work on time, but please remember, that we want( )high speed( ) quapty.A. both, andB. either, orC. neither, notD. not, but also
A good idea has just ____ to me that we can use the Internet to look for the information we want.A: occurredB: happenedC: took placeD: appeared
Care must be taken not to wash or iron synthetic fibers at _____.A、a too high temperatureB、too a high temperatureC、too high a temperatureD、a temperature too high
共用题干New Understanding of Natural Silk's MysteriesNatural silk,as we all know,has a strength that man-made materials have long struggled to match.In a discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re- searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak- nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen bonds that are intrinsically very weak but that work together to create a strong,flexible structure.Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle). But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.To get a better understanding of how silk manages to produce such strength through such weak bonds, the MIT team created a set of computer models that allowed them to observe the way silk behaves at the atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro- gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowlywhen they do fail,so as not to allow a sudden fracture to spread across a silk structure.The result is natural silks that can stretch and bend while retaining a high degree of strength.But while that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest materials are generally expensive and difficult to produce(requiring high temperature treatments or energy-intensive processes).By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless stronger than anything currently on offer. And if you thought you were going to get out of this materials science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural silk-like carbon nanotubes. Super-silks are on the horizon.If the hydrogen bonds break due to external forces,they break fast.A:RightB:WrongC:Not mentioned
共用题干New Understanding of Natural Silk's MysteriesNatural silk,as we all know,has a strength that man-made materials have long struggled to match.In a discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re- searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak- nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen bonds that are intrinsically very weak but that work together to create a strong,flexible structure.Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle). But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.To get a better understanding of how silk manages to produce such strength through such weak bonds, the MIT team created a set of computer models that allowed them to observe the way silk behaves at the atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro- gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowlywhen they do fail,so as not to allow a sudden fracture to spread across a silk structure.The result is natural silks that can stretch and bend while retaining a high degree of strength.But while that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest materials are generally expensive and difficult to produce(requiring high temperature treatments or energy-intensive processes).By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless stronger than anything currently on offer. And if you thought you were going to get out of this materials science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural silk-like carbon nanotubes. Super-silks are on the horizon.It is indicated that materials stronger than natural silk can be expected in the future.A:RightB:WrongC:Not mentioned
共用题干New Understanding of Natural Silk's MysteriesNatural silk,as we all know,has a strength that man-made materials have long struggled to match.In a discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re- searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak- nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen bonds that are intrinsically very weak but that work together to create a strong,flexible structure.Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle). But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.To get a better understanding of how silk manages to produce such strength through such weak bonds, the MIT team created a set of computer models that allowed them to observe the way silk behaves at the atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro- gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowlywhen they do fail,so as not to allow a sudden fracture to spread across a silk structure.The result is natural silks that can stretch and bend while retaining a high degree of strength.But while that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest materials are generally expensive and difficult to produce(requiring high temperature treatments or energy-intensive processes).By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless stronger than anything currently on offer. And if you thought you were going to get out of this materials science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural silk-like carbon nanotubes. Super-silks are on the horizon.The MIT team had tried different materials before they studied natural silk in their research.A:RightB:WrongC:Not mentioned
“When we roast a turkey，the temperature of the oven can’t be too high.”这句话的意思是（）。A、烤火鸡时，烤箱温度不宜过高。B、烤羊排时，烤箱温度不宜过高。C、烤火鸡时，火候不能太小。D、烤鱼时，火候不能太大。
单选题Early injection timing is indicated by （）.Ahigh exhaust temperature and low firing pressureBhigh exhaust temperature and high firing pressureClow exhaust temperature and low firing pressureDlow exhaust temperature and high firing pressure
单选题If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）Aa dirty lube oil strainerBinternal water leaksCan oil suction line restrictionDexcessive wears of the cooling water pump
单选题Black smoke coming from a boiler can be caused by （）.Alow water levelBhigh water levelCexcessively high fuel pressureDlow oil temperature
单选题High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by （）.Aengine overloadBlow combustion temperatureCplugged fuel nozzle holesDexcessive compression pressure
单选题As to the piston cooling, of the following, which statement is not true?（）ABecause the piston is exposed to very high temperature, it must be cooledBThe lower the piston cooling temperature is, the better it isCBoth water and lube oil can be used as coolantDOne of the piston cooling methods is vibration cooling, with better effect
单选题High speed aircraft is made of metals that can（）both high temperature and pressure.Astand byBput up withCwithholdDwithstand
填空题What we can learn from “Paper from Rag” is that you had better buy archival materials from specialist suppliers.____
单选题When bilge water is heated in a holding tank, which one of the following statements is not accurate?（）AThe high temperature facilitates primary gravity separationBMost of the oil and organic solvents are raised to the top layerCThe high the temperature is, the more the top oil will be collectedDThe high temperature has little use on the separation of emulsified oil
单选题High cylinder firing pressure, accompanied by low exhaust temperature, can result from （）Aimproper fuel rack positingBlengthy exhaust valve durationCextend operation at light loadDexcessively early injection timing
单选题Cloud formations are minimal when the（）.Asurface temperature and temperature aloft are equalBsurface temperature and temperature aloft differ greatlyCbarometric pressure is very lowDrelative humidity is very high
单选题Where can we go if we want to learn music?A25 Jiefang RoadB95 the Fifth AvenueC120 Xinjin StreetDThermopolis Town