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Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have plagued the transportation form.The plane is due to be delivered in 2021 and will cost just shy of$250 million.During a press conference hosted by the agency during which they announced the partnership,Lockheed Martin spokesperson Dave Richardson explained that the new plane will be neither a prototype for a new commercial airplane,nor a reincamation of previous supersonic jets."This is a purpose-built experimental research craft,"he said."This aircraft was designed from a clean sheet."NASA will use the plane to gather data about the impact ofits low-boom design,which the agency hopes will address the single biggest challenge of supersonic flight.Flying faster than the speed of sound produces shock waves that result in a loud booming sound."The air does not know that the airplane is coming,"Peter Coen,a NASA project manager for supersonic technology,explained during the press conference,Because no one liked hearing that noise,the Federal Aviation Administration and similar international organizations banned supersonic travel over land,Now,NASA thinks technology can break the sound barrier without being quite so loud about it.The secret is in the shape of the plane.Sonic booms form because the plane's flight produces many shock waves of different strengths headed in different directions that absorb into each other to create two strong pulses of pressure.From the testing done so far,NASA thinks the new plane's design successfully dissipates and weakens those shock waves,keeping them from forming the strong pulses responsible for booms.The plane would still produce what they've dubbed"sonic thumps,"but the hope is that those would be much easier to deal with.Once the new plane is built,NASA will run surveys on the ground to see how people respond to the sonic thumps.Then,the agency will bring that survey data to the Federal Aviation Administration and its intemational counterparts in order to revisit the rule about breaking the speed of sound over land."It's not about making a new airplane for airplanes'sake,although I love airplanes,"Richardson said."It's about the data that will be collected."If the rule change does come through,that could kick off a new era of commercial supersonic travel.34.The word"dissipates"（Para.6）most probably means
A.disperse.
B.dilute.
C.divide.
D.distribute.
B.dilute.
C.divide.
D.distribute.
参考答案
参考解析
解析：词汇理解题。根据题干定位到文章第六段。做此类题时，可通读对应段落后，仔细分析上下句，找到相对应的表达。dissipates与weakens由and连接，可知dissipate应与weaken词义相近，B项有“削弱”之意，与文义相符，故B项为正确选项。【干扰排除】A项、C项和D项在原文中均没有体现，因此应当排除。
更多 “Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have plagued the transportation form.The plane is due to be delivered in 2021 and will cost just shy of$250 million.During a press conference hosted by the agency during which they announced the partnership,Lockheed Martin spokesperson Dave Richardson explained that the new plane will be neither a prototype for a new commercial airplane,nor a reincamation of previous supersonic jets."This is a purpose-built experimental research craft,"he said."This aircraft was designed from a clean sheet."NASA will use the plane to gather data about the impact ofits low-boom design,which the agency hopes will address the single biggest challenge of supersonic flight.Flying faster than the speed of sound produces shock waves that result in a loud booming sound."The air does not know that the airplane is coming,"Peter Coen,a NASA project manager for supersonic technology,explained during the press conference,Because no one liked hearing that noise,the Federal Aviation Administration and similar international organizations banned supersonic travel over land,Now,NASA thinks technology can break the sound barrier without being quite so loud about it.The secret is in the shape of the plane.Sonic booms form because the plane's flight produces many shock waves of different strengths headed in different directions that absorb into each other to create two strong pulses of pressure.From the testing done so far,NASA thinks the new plane's design successfully dissipates and weakens those shock waves,keeping them from forming the strong pulses responsible for booms.The plane would still produce what they've dubbed"sonic thumps,"but the hope is that those would be much easier to deal with.Once the new plane is built,NASA will run surveys on the ground to see how people respond to the sonic thumps.Then,the agency will bring that survey data to the Federal Aviation Administration and its intemational counterparts in order to revisit the rule about breaking the speed of sound over land."It's not about making a new airplane for airplanes'sake,although I love airplanes,"Richardson said."It's about the data that will be collected."If the rule change does come through,that could kick off a new era of commercial supersonic travel.34.The word"dissipates"（Para.6）most probably meansA.disperse. B.dilute. C.divide. D.distribute.” 相关考题
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Which of the following is true about the motion of the moon?[A] The moon and the sun are moving in the same plane.[B] The moon revolved along the ecliptic.[C] The moon moves faster than the sun.[D] The position of the moon can be found changed in an hour's time.
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The library _____ next year will be more advanced than the old one.A、builtB、to be builtC、being builtD、to build
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We learn from the passage that__________A．the passengers will have a night flightB．they will have, meals during the flightC．the plane is going to fly across a seaD．the plane provides excellent service to its，passengers
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Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground．What should you expect under these circumstances ________．A.The generated CPA will be less than the actual CPAB.The generated TCPA will be later than the actual TCPAC.The range of initial target acquisition will be less than normalD.The targets true course vector will be in error
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Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have plagued the transportation form.The plane is due to be delivered in 2021 and will cost just shy of$250 million.During a press conference hosted by the agency during which they announced the partnership,Lockheed Martin spokesperson Dave Richardson explained that the new plane will be neither a prototype for a new commercial airplane,nor a reincamation of previous supersonic jets."This is a purpose-built experimental research craft,"he said."This aircraft was designed from a clean sheet."NASA will use the plane to gather data about the impact ofits low-boom design,which the agency hopes will address the single biggest challenge of supersonic flight.Flying faster than the speed of sound produces shock waves that result in a loud booming sound."The air does not know that the airplane is coming,"Peter Coen,a NASA project manager for supersonic technology,explained during the press conference,Because no one liked hearing that noise,the Federal Aviation Administration and similar international organizations banned supersonic travel over land,Now,NASA thinks technology can break the sound barrier without being quite so loud about it.The secret is in the shape of the plane.Sonic booms form because the plane's flight produces many shock waves of different strengths headed in different directions that absorb into each other to create two strong pulses of pressure.From the testing done so far,NASA thinks the new plane's design successfully dissipates and weakens those shock waves,keeping them from forming the strong pulses responsible for booms.The plane would still produce what they've dubbed"sonic thumps,"but the hope is that those would be much easier to deal with.Once the new plane is built,NASA will run surveys on the ground to see how people respond to the sonic thumps.Then,the agency will bring that survey data to the Federal Aviation Administration and its intemational counterparts in order to revisit the rule about breaking the speed of sound over land."It's not about making a new airplane for airplanes'sake,although I love airplanes,"Richardson said."It's about the data that will be collected."If the rule change does come through,that could kick off a new era of commercial supersonic travel.32.The crucial factor in the sound barrier breaking technology isA.how to create the strong pulses of pressure.
B.how to shape the experimental plane.
C.how to run the surveys mentioned.
D.how to produce the sonic thumps.
考题
Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have plagued the transportation form.The plane is due to be delivered in 2021 and will cost just shy of$250 million.During a press conference hosted by the agency during which they announced the partnership,Lockheed Martin spokesperson Dave Richardson explained that the new plane will be neither a prototype for a new commercial airplane,nor a reincamation of previous supersonic jets."This is a purpose-built experimental research craft,"he said."This aircraft was designed from a clean sheet."NASA will use the plane to gather data about the impact ofits low-boom design,which the agency hopes will address the single biggest challenge of supersonic flight.Flying faster than the speed of sound produces shock waves that result in a loud booming sound."The air does not know that the airplane is coming,"Peter Coen,a NASA project manager for supersonic technology,explained during the press conference,Because no one liked hearing that noise,the Federal Aviation Administration and similar international organizations banned supersonic travel over land,Now,NASA thinks technology can break the sound barrier without being quite so loud about it.The secret is in the shape of the plane.Sonic booms form because the plane's flight produces many shock waves of different strengths headed in different directions that absorb into each other to create two strong pulses of pressure.From the testing done so far,NASA thinks the new plane's design successfully dissipates and weakens those shock waves,keeping them from forming the strong pulses responsible for booms.The plane would still produce what they've dubbed"sonic thumps,"but the hope is that those would be much easier to deal with.Once the new plane is built,NASA will run surveys on the ground to see how people respond to the sonic thumps.Then,the agency will bring that survey data to the Federal Aviation Administration and its intemational counterparts in order to revisit the rule about breaking the speed of sound over land."It's not about making a new airplane for airplanes'sake,although I love airplanes,"Richardson said."It's about the data that will be collected."If the rule change does come through,that could kick off a new era of commercial supersonic travel.33.Sonic booms result fromA.the shape ofplane.
B.the sonic thumps.
C.the strong pulses.
D.the sound barrier.
考题
Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have plagued the transportation form.The plane is due to be delivered in 2021 and will cost just shy of$250 million.During a press conference hosted by the agency during which they announced the partnership,Lockheed Martin spokesperson Dave Richardson explained that the new plane will be neither a prototype for a new commercial airplane,nor a reincamation of previous supersonic jets."This is a purpose-built experimental research craft,"he said."This aircraft was designed from a clean sheet."NASA will use the plane to gather data about the impact ofits low-boom design,which the agency hopes will address the single biggest challenge of supersonic flight.Flying faster than the speed of sound produces shock waves that result in a loud booming sound."The air does not know that the airplane is coming,"Peter Coen,a NASA project manager for supersonic technology,explained during the press conference,Because no one liked hearing that noise,the Federal Aviation Administration and similar international organizations banned supersonic travel over land,Now,NASA thinks technology can break the sound barrier without being quite so loud about it.The secret is in the shape of the plane.Sonic booms form because the plane's flight produces many shock waves of different strengths headed in different directions that absorb into each other to create two strong pulses of pressure.From the testing done so far,NASA thinks the new plane's design successfully dissipates and weakens those shock waves,keeping them from forming the strong pulses responsible for booms.The plane would still produce what they've dubbed"sonic thumps,"but the hope is that those would be much easier to deal with.Once the new plane is built,NASA will run surveys on the ground to see how people respond to the sonic thumps.Then,the agency will bring that survey data to the Federal Aviation Administration and its intemational counterparts in order to revisit the rule about breaking the speed of sound over land."It's not about making a new airplane for airplanes'sake,although I love airplanes,"Richardson said."It's about the data that will be collected."If the rule change does come through,that could kick off a new era of commercial supersonic travel.31.According to the first two paragraphs,the experimental planeA.will need an exact budget of$250 million.
B.will be put into service in 2021.
C.is designed from an entirely new angle.
D.is based on a new commercial purpose.
考题
Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have plagued the transportation form.The plane is due to be delivered in 2021 and will cost just shy of$250 million.During a press conference hosted by the agency during which they announced the partnership,Lockheed Martin spokesperson Dave Richardson explained that the new plane will be neither a prototype for a new commercial airplane,nor a reincamation of previous supersonic jets."This is a purpose-built experimental research craft,"he said."This aircraft was designed from a clean sheet."NASA will use the plane to gather data about the impact ofits low-boom design,which the agency hopes will address the single biggest challenge of supersonic flight.Flying faster than the speed of sound produces shock waves that result in a loud booming sound."The air does not know that the airplane is coming,"Peter Coen,a NASA project manager for supersonic technology,explained during the press conference,Because no one liked hearing that noise,the Federal Aviation Administration and similar international organizations banned supersonic travel over land,Now,NASA thinks technology can break the sound barrier without being quite so loud about it.The secret is in the shape of the plane.Sonic booms form because the plane's flight produces many shock waves of different strengths headed in different directions that absorb into each other to create two strong pulses of pressure.From the testing done so far,NASA thinks the new plane's design successfully dissipates and weakens those shock waves,keeping them from forming the strong pulses responsible for booms.The plane would still produce what they've dubbed"sonic thumps,"but the hope is that those would be much easier to deal with.Once the new plane is built,NASA will run surveys on the ground to see how people respond to the sonic thumps.Then,the agency will bring that survey data to the Federal Aviation Administration and its intemational counterparts in order to revisit the rule about breaking the speed of sound over land."It's not about making a new airplane for airplanes'sake,although I love airplanes,"Richardson said."It's about the data that will be collected."If the rule change does come through,that could kick off a new era of commercial supersonic travel.35.In the eyes of the author,the new plane isA.promising.
B.premium.
C.speedy.
D.risky.
考题
To google is now in broad usage as a verb for retrieving information from the intemet.If the tech giant has its way,"I Googled"will become a standard reply to the question,How did you get here?"On May 28th Google said it would build 100 prototype driverless cars without pedals,steering wheel or controls.It is the next stage in its apparent quest to be as popular on the road as on computer screens.People have dreamed about driverless motoring since at least the 1930s,but only in recent years have carmakers such as Mercedes-Benz and volvo given the matter more thought kitting out test cars with the sensors and sophisticated software required to negotiate busy roads.Google has roared ahead by designing a driverless car from the ground up.But bringing autonomous motoring to the world is proving harder than Google had envisaged
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共用题干
Rockets in the SkyIf someone asked you,"What color is the sky?"I expect that you would answer,"Blue."I am afraid that you would be wrong.The sky has no color.When we see blue,we are looking at blue sunlight.The sunlight is shining on little bits of dust in the air.We know that there is air all around the world.We could not breathe without air.Airplanes could not fly without air.They need air to lift their wings.Airplanes cannot fly very high because as they go higher the air gets thinner.If we go far enough away from the earth,we find there is no air.What is the sky?The sky is space.In this space there is nothing except the sun,the moon and all the stars. Scientists have always wanted to know more about the other worlds in the space.They have looked at them through telescopes and in this way they have found out a great deal.The moon is about 384 ,000 kilometers away from the earth.An airplane cann't fly to the moon but there is a thing that can fly even when there is no air. This is rocket.I am sure that you are asking,"How does a rocket fly?"If you want to know,get a balloon and then blow it up until it is quite big.Do not tie up the neck of the balloon.Let go!The balloon will fly off through the air very quickly.The air inside the balloon tries to get out.It rushes out through the neck of the balloon and this pushes the balloon through the air.It does not need wings like an airplane.This is how a rocket works.It is not made of rubber（橡胶）like a balloon,of course.It is made of metal. The metal must not be heavy but it must be very strong.There is gas inside the rocket which is made very hot. When it rushes out of the end of the rocket,the rocket is pushed up into the air.Rockets can fly far out into space.Rockets with men inside them have already reached the moon.Several rockets,without men inside them,have been sent to other worlds much farther away.One day rockets may be able to go anywhere in the space.When an airplane flies too high,______.A:the air will be too thin to support its wingsB:the air will become thickerC:the air will exert pressure on itD:the air will disappear in no time
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To Google is now in broad usage as a verb for retrieving information from the intemet.If the tech giant has its way,"I Googled"will become a standard reply to the question,"How did you get here?"On May 28th Coogle said it would build 100 prototype driverless cars without pedals,steering wheel or controls.It is the next stage in its apparent quest to be as popular on the road as on computer screens.People have dreamed about driverless motoring since at least the 1930s,but only in recent years have carmakers such as Mercedes-Benz and Volvo given the matter more thought,kitting out test cars with Lhe sensors and sophisticated software required lo negoliate busy roads.Google has roared ahead by designing a drivedess car from the ground up.But bringing autonomous motoring to the world is proving harder than Google had envisaged.
考题
Which of the following statements is true about L3 cache?（）A、L3 cache operates faster than the system processorB、L3 cache runs at the speed of the processor.C、L3 cache can deliver data in as little as 15ns.D、L3 cache runs at the speed of the system bus.
考题
The company has purchased one hundred and fifty new servers. The server administrator needs to build and deploy them as quickly as possible. Which of the following is the FASTEST method of building and deploying each server？（）A、Build each server from the OS manufacturer’s build disk.B、Use an imaging system to manually deploy the build to the servers.C、Build each server with the manufacturer’s build disk.D、Give the company build disk to the server manufacturer.
考题
Which two statements are characteristics of a distance vector routing protocol?（）A、RIP is an example of distance vector routing protocols.B、Updates are periodic and include the entire routing table.C、Routing updates are sent only after topology changesD、The protocol can be useful in hub-and-spoke and hierarchical networks.E、Convergence is usually faster than with link state protocolsF、Each router has its own view of the topology
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Which of the following statements is true about L3 cache？（）A、L3 cache operates faster than the system processor.B、L3 cache runs at the speed of the processor.C、L3 cache can deliver data in as little as 15ns.D、L3 cache runs at the speed of the system bus.
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单选题According to the last paragraph, it will be the most difficult for a person who has lost the hearing in one ear to tell ______.A
where the source of a sound isB
how loud a sound isC
when a sound starts to appearD
what makes a sound
考题
单选题We may infer from the second paragraph that ______.A
gas price has no influence on drivers.B
Toyota Yaris is not welcome in Manhattan.C
Nissan Versa has already been well selling for its six-speed transmission.D
Honda Fit is more economical than Chevy Suburban SUV.
考题
单选题As the plane flew off towards the mountains in the distance the sound of its engines gradually ______.A
died awayB
sank down C
dropped offD
went out
考题
单选题Which effect does speed through the water have on a vessel which is underway in shallow water （）.A
A decrease in the speed results in a decrease in steering response and maneuverabilityB
An increase in speed results in the stern sucking down lower than the BowC
An increase in speed results in the vessel rising on an even planeD
A decrease in speed results in the vessel sucking down on an even plane
考题
多选题Which two statements are characteristics of a distance vector routing protocol?（）ARIP is an example of distance vector routing protocolsBUpdates are periodic and include the entire routing tableCRouting updates are sent only after topology changesDThe protocol can be useful in hub-and-spoke and hierarchical networksEConvergence is usually faster than with link state protocolsFEach router has its own view of the topology
考题
单选题The company has purchased one hundred and fifty new servers. The server administrator needs to build and deploy them as quickly as possible. Which of the following is the FASTEST method of building and deploying each server？（）A
Build each server from the OS manufacturer’s build disk.B
Use an imaging system to manually deploy the build to the servers.C
Build each server with the manufacturer’s build disk.D
Give the company build disk to the server manufacturer.
考题
单选题Which of the following statements is true about L3 cache?（）A
L3 cache operates faster than the system processorB
L3 cache runs at the speed of the processor.C
L3 cache can deliver data in as little as 15ns.D
L3 cache runs at the speed of the system bus.
考题
单选题The pilot of the plane which flies faster than sound travels does not hear the thunderclaps because______.A
the sound of plane engine travels slower than the planeB
the frequency of the sound altersC
the passage does not mention itD
the pressure decreased when the plane flies in the air
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问答题Is There Life on Mars? The American space agency, NASA (the National Aeronautics and Space Administration), has drawn up a short list of ten research projects that will form the basic of an ambitious program to explore the planet Mars in a mission scheduled for launch in 2007. Scientists are being asked to use their ingenuity to devise novel ways to explore the red planet using intelligent robots and probes that might perhaps answer the biggest question of all—-is there life on Mars? NASA chose the ten projects from a list of 43 hopefuls. It has included missions for returning samples of Martian dust and gas to Earth, networks of small landers, orbiting constellations of microprobes and a rover that would try to date the precise age of rocks and soils. The ten concepts are part of the Mars Scout program to be launched in six years. This follows a decade of the most intensive interest in Mars since the two Viking probes of 1976 which sent back eerie images of the Martian landscape some 400 million kilometers away. But the history of Mars exploration is littered with failure—more than half of the 30 missions to date have ended in fiasco. It was NASA’s announcement in August 1996 of possible signs of life in a Martian meteorite which had fallen to Earth that rekindled intense interest in Earth’s nearest neighbor. It was assumed that liquid water had once flowed on Mars and an ancient atmosphere might have supported living organisms. However, opposing camps of scientists bitterly disputed NASA’s evidence for primitive life-forms in the Martian meteorite ALH84001. This led to the conclusion that the only way of finding out whether life ever existed on Mars is to go there and have a look. NASA planned a bold series of increasingly complex missions involving the launch of a couple of space probes every year for a dozen years. One of the most successful so far was the shoe-box-sized So-journer rover which thrilled a world Internet audience when it was wheeled out in 1997. Since then, however, NASA has suffered a series of setbacks. In September 1999 its Mars Climate Orbiter was lost as a failed rocket bum plunged it into the Martian atmosphere. NASA blamed it on one of its team using imperial units and another using metric. Three months later, NASA lost contact with its Polar Lander as it approached touchdown on the frozen South Pole of the planet. Space commentators muttered darkly about Mars being a cosmic equivalent of the Bermuda triangle. The year of 2001 saw the successful completion of the Global Surveyor mission, an orbiting probe that took pictures of what some scientists say are channels in the dust where water may still occasionally flow from underground well. More recently, the Mars Odyssey probe was launched without hitch and is due to arrive in 2008. Meanwhile, the European Space Agency is planning its own visit to the red planet with the launch of its Mars Express mission scheduled for take-off in .June 2003. Britain is designated to take a lead role in the project with the Beagle 2 Lander, a small craft, the size of a kitchen sink designed to shuffle over the Martian landscape taking soil and rock samples, analyzing them for signs of life and transmitting the data back to Earth. Beagle 2—framed after the ship that carded Charles Darwin on his voyage of discovery—will weigh just 60 kilograms and will cost about US $225,000 to build, a fraction of the cost of building the Viking space probes more than 25 years ago. Beagle 2 will look for water, minerals and organic matter. Although it will reach Mars before NASA’s Scout mission is even launched, it will be considerably less sophisticated in tea’ms of analytical technology. The focus now for NASA is on what instruments and robots to put on the Mars Scout mission in six years. Ed Weiler, NASA’s associate administrator for space science, had to decide on a top ten to concentrate NASA’s limited resources. Each project is to receive a grant of $150,000 to see them through the next six months of development. It all has to come out of a total project budget capped at $300 million. These Scout concepts embody the spirit I first thought about more than a year ago; and will enable us to explore the diversity of Mars in new ways, Dr Weiler said.
考题
单选题Deck foam systems，designed to protect cargo areas on tankers built after January 1，1975，must have a supply of foam-producing material to operate the system at its designed rate of foam production for（）.A
15 minutes without rechargingB
20 minutes without rechargingC
25 minutes without rechargingD
30 minutes without recharging
考题
单选题Which of the following can serve as the best title of this passage?A
The Prefix Mach.B
The Speed of Sound.C
The Frequency of Sound.D
The Intensity of Sound.
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