It has been documented that during World War Ⅱ, America's armed forces once tried formation flight to save fuel.
It has been documented that during World War Ⅱ, America's armed forces once tried formation flight to save fuel.
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Those who lost their husbands during World War Ⅱ were ()war wisdoms. A、called asB、namedC、refered toD、spoken of as
The world's oil supplyA. haven been gradually being exhaustedB. is being gradually exhaustedC. is gradually exhaustedD. has gradually exhausted
"The pen is more powerful than the sword (剑)." There have been many writers who used their pens to fight things that were wrong. Mrs. Harriet Beecher Stowe was one of them. She was born in the USA in 1811. One of her books not only made her famous but has been described as one that excited the world, and was helpful in causing a civil war and freezing the slaves. The civil war was the American Civil War of 1861, in which the Northern States fought the Southern States and finally won. This book was named "Uncle Toms Cabin". There was time when every English-speaking man, woman, and child has read this novel that did so much to stop slavery. Not many people read it today, but it is still very interesting. The book has shown us how a warm-hearted writer can arouse (唤起) peoples sympathies (同情). The writer herself had neither been to the Southern States nor been a slave. The Southern Americans were very angry at the novel, which they said did not at all represent (代表) true state of affairs,1、According to the passage ( ).A、every English-speaking person had read "Uncle Tom's Cabin"B、"Uncle Tom's Cabin" was not very interestingC、those who don''t speak English can not have read "Uncle Tom's Cabin"D、the book "Uncle Tom's Cabin" did a great deal in the American Civil War2、How old was Mrs. Stowe when her world famous book was published? ( )A、About 60 years old.B、Over 50 years old.C、In her forties.D、Around 30 years old.3、What do you learn about Mrs. Stowe from the passage? ( )A、She had been living in the north of America before the American Civil War.B、She herself encouraged the northern Americans to go to war and set the slaves free.C、She was better as writing as using a sword.D、She had once been a slave.4、Why could Mrs. Stowe's book cause a civil war in America? ( )A、She wrote so well that Americans loved her very much.B、She disclosed (揭露) the terrible wrongs that had been done to the slaves in the Southern States.C、The Southern Americans hated the book while the Northern Americans like it.D、The book had been read by many Americans.5、What can we learn from the passage? ( )A、We needn't use weapons (武器) to fight things that are wrong.B、 writer is more helpful in a war than a soldier.C、We must understand the importance of literature and art.D、No war can be won without such a book as "Uncle Tom's Cabin".
Experiments of this kind ____ in both the U.S. and Europe well before the World War. A have conductedB have been conductedC had conductedD had been conducted
The world’s supplies of copper (). A、have gradually being exhaustedB、are gradually exhaustedC、has been gradually exhaustedD、are being gradually exhausted
The Audio－lingual Method was developed in the () during World War II. A.GermanB.ChinaC.FranceD.United States
Apart from a break during the Second World War, the BBC has been providing regular television broadcasts since ___________. A.1935B.1936C.1937D.1938
By saying "the world has been spared a t.rue water war" (Line 1, Para.4), the author means（ ）[A] the water supply in the world is more than needed[B] the world has saved enough water to avoid the war[C] the world has never suffered a war triggered by water[D] the world spares no effort to avoid a war caused by water
A new computer system has been designed to stop ships sinking.The greater danger to holed vessel is that flooding of its compartments will make the ship unstable enough to capsize.It is estimated that nearly half the ships lost during the second world war capsized because of loss of sability.Pacer Systems of Burlington.Massachusetts,has now reineda system（ ）by a reserve US Navy officer,Stephen Drabouski,which effectively thought out alternative strategies for the ship.A.ownedB.searchedC.capturedD.devised
The small village is said __________ in a battle during World War ]].A.to have been destroyedB.to be destroyedC.to destroyedD.to have destroyed
Racial discrimination has still___________ in some parts of the U.S.A. since itafter the Civil War.A.been existed; has been done awayB.existed; has been done away withC.been existed; has been done away withD.existed; was done away with
Copying Birds May Save Aircraft FuelBoth Boeing and Airbus have trumpeted the efficiency of their newest aircraft.The 787 and 350 respectively.Their clever designs and lightweightcompositescertainly make a difference.But a group of researchers at Stanford University,led by Ilan Kroo,has suggested that airlines could take a more naturalisticapproach to cutting jet-fuel use and it would not require them to buy newaircraft.The answer,says Dr Kroo,lies with birds.Since 1914,scientists have known thatbirds flying in formation-a V-shape-expend less energy.The air flowing over abird's wings curls upwards behind the wingtips.a phenomenon known asupwash.Other birds flying in the upwash experience reduced drag,and spendless energy propelling themselves.Peter Lissaman,anaeronautics expert whowas formerly at Caltech and the University of Southern California,has suggestedthat a formation of 25 birds might enjoy a range increase of 71%.When applied to aircraft,the principles are not substantially different.Dr Krooand his team modeled what would happen if three passenger jets departing fromLos Angeles,San Francisco and I as Vegas were to assemble over Utah,assume aninverted V-formation occasionally change places so all could have a turn in themost favourable positions,and proceed to London.They found that the aircraftconsumed as much as 15%less fuel（coupled with a reduction in carbon-dioxideoutput）.Nitrogen-oxide emissions during the cruising portions of the flight fellby around a quarter.There are,of course,knots to be worked out.One consideration is safety,or atleast the perception of it.Would passengers feel comfortable travelling incompanion?Dr Kroo points out that the aircraft could be separated by severalnautical miles,and would not be in the intimate groupings favoured by displayteams like the Red Arrows,A passenger peering out of the window might noteven see the other planes.Whether the separation distances involved wouldsatisfy air-traffic-control regulations is another matter,although a working groupat the International Civil Aviation Organisation has included the possibility offormation flying in a blueprint for new operational guidelines.It remains to be seen how weather conditions affect the air flows that makeformation flight more efficient.In zones of increased turbulence,the planes'wakes will decay more quickly and the effect will diminish.Dr Kroo says this isone of the areas his team will investigate further.It might also be hard for airlinesto co-ordinate the departure times and destinations of passenger aircraft in a waythat would allow them to gain from formation flight.Cargo aircraft,in contrast,might be easier to reschedule,as might routine military flight.As it happens,America's armed forces are on the on case already.Earlier thisyear the country'S Defence Advanced Research Projects Agency announcedplans to pay Boeing to investigate formation flight,though the programme hasyet to begin.There are reports that some military aircraft flew in formation whenthey were low on fuel during the Second World War,but Dr Lissaman says theyare unsubstantiated."My father was an RAF pilot and my cousin the skipper of aLancaster lost over Berlin,"he adds.So he should knowIt has been documented that during World War I,America's armed forcesonce tried formation flight to save fuel.
共用题干New Foods and the New WorldIn the last 500 years,nothing about people—not their clothes,ideas,or languages—has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree by South American Indians .The Spanish introduced it to the rest of the world during the 1500's .And although it was very expensive,it quickly became fashionable.In London,shops where chocolate drinks were served became important meeting places. Some still exist today.The potato is also from the New World. Around 1600,the Spanish brought it from Peru to Europe,where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the“Potato Famine”of 1845—1846,and thou- sands more were forced to emigrate to America.There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee,and coffee is an important crop in Colombia and other South American countries.But it is native to Ethiopia. It was first made into a drink by Arabs during the 1400's.According to an Arabic legend,coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush.He tried one and experienced the “wide-awake”feeling that one-third of the world's population now starts the day with. The Arabic legend is used to prove thatA:.coffee was first discovered by KaldiB: coffee was first discovered by Kaldi's goatsC:.coffee was first discovered in south American countriesD: coffee drinks were first made by Arabs
共用题干New Foods and the New WorldIn the last 500 years,nothing about people—not their clothes,ideas,or languages—has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree by South American Indians .The Spanish introduced it to the rest of the world during the 1500's .And although it was very expensive,it quickly became fashionable.In London,shops where chocolate drinks were served became important meeting places. Some still exist today.The potato is also from the New World. Around 1600,the Spanish brought it from Peru to Europe,where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the“Potato Famine”of 1845—1846,and thou- sands more were forced to emigrate to America.There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee,and coffee is an important crop in Colombia and other South American countries.But it is native to Ethiopia. It was first made into a drink by Arabs during the 1400's.According to an Arabic legend,coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush.He tried one and experienced the “wide-awake”feeling that one-third of the world's population now starts the day with.“Some”in“some still exist today”(Para. 1)means______.A:some cocoa treesB: some chocolate drinksC: some shopsD: some South American Indians
共用题干New Foods and the New WorldIn the last 500 years,nothing about people—not their clothes,ideas,or languages—has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree by South American Indians .The Spanish introduced it to the rest of the world during the 1500's .And although it was very expensive,it quickly became fashionable.In London,shops where chocolate drinks were served became important meeting places. Some still exist today.The potato is also from the New World. Around 1600,the Spanish brought it from Peru to Europe,where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the“Potato Famine”of 1845—1846,and thou- sands more were forced to emigrate to America.There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee,and coffee is an important crop in Colombia and other South American countries.But it is native to Ethiopia. It was first made into a drink by Arabs during the 1400's.According to an Arabic legend,coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush.He tried one and experienced the “wide-awake”feeling that one-third of the world's population now starts the day with. According to the passage,which of the following has changed the most in the last 500 years?A: Food.B: Chocolate.C:Potato.D: Coffee.
共用题干New Foods and the New WorldIn the last 500 years,nothing about people—not their clothes,ideas,or languages—has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree by South American Indians .The Spanish introduced it to the rest of the world during the 1500's .And although it was very expensive,it quickly became fashionable.In London,shops where chocolate drinks were served became important meeting places. Some still exist today.The potato is also from the New World. Around 1600,the Spanish brought it from Peru to Europe,where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the“Potato Famine”of 1845—1846,and thou- sands more were forced to emigrate to America.There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee,and coffee is an important crop in Colombia and other South American countries.But it is native to Ethiopia. It was first made into a drink by Arabs during the 1400's.According to an Arabic legend,coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush.He tried one and experienced the “wide-awake”feeling that one-third of the world's population now starts the day with. Coffee originally came from_______.A:.BrazilB: ColombiaC:EthiopiaD: Arabia
共用题干New Foods and the New WorldIn the last 500 years,nothing about people—not their clothes,ideas,or languages—has changed as much as what they eat. The original chocolate drink was made from the seeds of the cocoa tree by South American Indians .The Spanish introduced it to the rest of the world during the 1500's .And although it was very expensive,it quickly became fashionable.In London,shops where chocolate drinks were served became important meeting places. Some still exist today.The potato is also from the New World. Around 1600,the Spanish brought it from Peru to Europe,where it soon was widely grown. Ireland became so dependent on it that thousands of Irish people starved when the crop failed during the“Potato Famine”of 1845—1846,and thou- sands more were forced to emigrate to America.There are many other foods that have traveled from South America to the Old World. But some others went in the opposite direction. Brazil is now the world's largest grower of coffee,and coffee is an important crop in Colombia and other South American countries.But it is native to Ethiopia. It was first made into a drink by Arabs during the 1400's.According to an Arabic legend,coffee was discovered when a person named Kaldi noticed that his goats were attracted to the red berries on a coffee bush.He tried one and experienced the “wide-awake”feeling that one-third of the world's population now starts the day with. Thousands of Irish people starved during the“Potato Famine”because______.A: they were so dependent on the potato that they refused to eat anything elseB: they were forced to emigrate to AmericaC: the weather conditions in Ireland were not suitable for growing the potatoD:.the potato harvest was bad
Prescription charges do not apply to the following people except（）A、self-employed peopleB、child under 16C、war and armed forces disablement pensionersD、women aged 60 and over and men aged 65 and over
When will an "all configuration" backup be imported into the Cisco UCS Manager？（）A、 During the initial configuration from the consoleB、 Once the basic configuration has been appliedC、 To restore the configuration on a secondary fabric interconnectD、 To upgrade the firmware on a replacement fabric interconnect
单选题The farm produced more food than ______ thought possible during World War II.Aever beBwould ever beChas ever been Dhad ever been
单选题When will an "all configuration" backup be imported into the Cisco UCS Manager？（）A During the initial configuration from the consoleB Once the basic configuration has been appliedC To restore the configuration on a secondary fabric interconnectD To upgrade the firmware on a replacement fabric interconnect
问答题Practice 1 France today is no superpower, but French influence in some spheres is significant. Nothing has cemented French influence in the world like the decision made by the victorious World War II powers in 1945 to include France as one of the five permanent, veto-wielding members of the Security Council. Until the end of the Cold War, France rarely found itself in disagreement with Britain or the U.S. on major issues. But the U. N. veto today takes on larger significance as France struggles to decide whether it wants to lead the European Union in defiance of American power or in partnership with it. As America’s great media outlets have begun preparing for coverage of the D-Day celebrations, the question of a “grand gesture” by the French toward the American war in Iraq, has been raised. Administration officials hint that. perhaps，just perhaps，the French President wm use the occasion of France's rescue as an opportunity to square the accounts—to issue a blanket endorsement of America 78 plan for Iraq’s future and throw its support behind the transfer of power looming at the end of the month. France certainly wants the United States-to be successful in Iraq at this point. But France seems unlikely to see D-Day as an opportunity to make good on a 60-year-old debt. Beyond nice speeches and some truly fine cuisine, don't expect France to liberate America from Iraq.
单选题When did Nadia’s family move to England from Germany? ADuring World War IBDuring World War ⅡCTen years ago
单选题While several baseball teams have tried to supplant the Yankees as the dominant team in baseball, their inability has been unable to win even half as many World Series as the Yankees have won in the past one hundred years.Atheir inability has been unableBthe inability they possess has not been ableChaving been unableDthey were unableEthey have been unable
单选题The farm produced more food than _____ thought possible during World War II.Aever beBwould ever beChas ever beenDhad ever been