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提问人：网友wshlhr 发布时间：2022-01-07

[主观题]

New fighter jets are being designed so that the wing is modifiable, depending on the spe

ed at which the plane is going. Which

of the following would be a logical adjustment of the wing for such jets？

A.At speeds above 500 mph, the top of the wing would become flatter.

B.At speeds above 500 mph, the top of the wing would become more curved.

C.At speeds above 500 mph, the bottom of the wing would become curved.

D.None of the above

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更多“New fighter jets are being designed so that the wing is modifiable, depending on the spe”相关的问题

第1题

The Concorde is completely distinctive from other jets in that it ______ .A．flies with a l

The Concorde is completely distinctive from other jets in that it ______ .

A．flies with a large blanket

B．is as powerful as four F-4 fighter jets

C．produces low-level noise

D．is unusually loud

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第2题

听力原文： A passenger jet headed for New York City was forced to land at Halifax, Canada t

his morning. The plane's transponder was broadcasting a signal indicating it had been hijacked. The Virgin Atlantic flight from London's Heathrow Airport was midway across the Atlantic when air traffic control officials in the US started receiving its signal: a signal which carried a special code indicating them was a hijacking in progress. Canadian fighter jets operating under NORAD, the joint Canada-US command, were scrambled to intercept the jet. According to NORAD, the pilots of the passenger jet repeatedly radioed in to tell controllers they were not being hijacked. But US officials erred on the side of caution. After the plane landed, armed police boarded it to ensure there were no hijackers. It was determined that the plane's transponder had mal-functioned, and was mistakenly transmitting code "7500" for hijacking.

Why the passenger jet was forced to land at Halifax, Canada？

A．Some passengers would get off the plane in Canada.

B．There was something wrong about the plane and it could not fly again.

C．Because there were criminals on the jet plane. '

D．Because it had been thought that the jet had been hijacked.

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第3题

The controversial Anglo-French supersonic transport plane, the Concorde, had attracted muc

h attention because it is unusually loud. A late-model jumbo 747, for example, creates 100 or more decibels of sound over an eight-square-kilometer area. The Concorde spreads a 100-decibel-plus blanket of noise over some 140 square kilometers. On takeoff, the Concorde sounds like four F-4 fighter jets taking off at once. Its penetrating, low-frequency rumble makes the Concorde "completely distinctive" from other jets.

What bothers noise experts is that plenty of commonplace machines are just as loud as, or even louder than, the Concorde. A sanitation truck can be noisier, and so can a heavy diesel truck pulling away from a stop sign. One expert who has gone out of his way to dramatize the prevalent offensiveness of the city sound-scale is Dr. Thomas H. Fay, director of speech and hearing at Columbia-Presbyterian Medical Center in New York. Dr. Fay took a sound-meter into a New York City subway and proved that an approaching train can be twice as loud as the Concorde.

Since World War Ⅱ, the number of the high-powered noise-makers, from trucks and motorcycles to air conditioners and sirens has increased almost geometrically. It' s no wonder that in many areas of the country, especially in the suburbs, the average sound level has doubled in 20 years. Noise experts estimate that city noises are increasing a half-decibel a year. They found that in 1971 the quietest parts of Los Angeles--thought to be a relatively quiet city--were louder than the loudest districts of New York in 1937.

This passage mainly talks about ______ .

A．the problem of the supersonic transport plane, the Concorde

B．a comparison between the Concorde and other machines

C．the problem of noise

D．noise in the suburbs

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第4题

根据短文回答 23～30 题。 60th Anniversary Ceremony in Moscow 1With thousands of soldie

根据短文回答 23～30 题。

60th Anniversary Ceremony in Moscow

1 With thousands of soldiers and war veterans parading across Moscow's Red Square and fighter jets screaming overhead,Russia celebrated the 602"anniversary of defeating Nazi Germany.More than 50 world leaden,including China's President Hu Jlntao.atttended the ceremony.

2 Speaking at the start of the parade,Russia's President Vladimir Putin praised all those who fought for freedom and independence."The war shows that resorting to force to solve problems will result in tragedy for the world。SO a peaceful order should be safeguarded(护卫)based on security, justice and cultural exchange,"Putin said."Faced with the real threat of terrorism today, we must remain faithful to the memory of OU|‘ fathers.It is our duty to defend a world order based on security and justice and on a new culture of relations among nations that will not allow a repeat of any war,neithor‘cold'nor ‘hot'he continued.

3 The Second World War is perhaps the most catastrophic(灾难性的)event that mankind has ever suffered.The war affected 80 per cent of the world's people at that time。from 61 countries。and claimed 55 million lives.

4 After the celebration,President Hu said that peace,development and cooperation were the future."China will unswervingly(坚定地)follow the road of peace and development and will make a joint effort with all nations to contribute to safeguarding world peace and promoting development."he said.

5 German Chancellor Gerhard Schroeder asked Russia for forgiveness for the suffering Germany inflicted(造成)during the Second World War in an article in Sunday's Komsomolskaya Pravda newspaper."Today we ask forgiveness for the suffering inflicted upon the Russian people and other peoples at the hands of Germans and in the name of Germans,"Schroeder said.

6 President Hu and the other leaders also joined a wreath(花圈)laying ceremony at the Tomb of the Unknown Soldiers on Monday.

第 23 题 Paragraphs 2________________

A．Pacific war

B．Gloomy world

C．Putin's commemorating special

D．China's determination

E．Schroeder's plea for forgiveness

F．World's worst disaster

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第5题

根据短文回答 23～30 题。 60th Anniversary Ceremony in Moscow 1 With thousands of soldi

根据短文回答 23～30 题。

60th Anniversary Ceremony in Moscow

1 With thousands of soldiers and war veterans parading across Moscow's Red Square and fighter jets screaming overhead,Russia celebrated the 60‘"anniversary of defeating Nazi German y.More than 50 world leaders,including China's President Hu Jinta0, attended the ceremony.

2 Speaking at the start of the parade,Russia's President Vladimir Putin praised all those who fought for freedom and independence."The war shows that resorting to force to solve problems will result in tragedy for the world,SO a peaceful order should be safeguarded(护卫)based on security, justice and cultural exchange,"Putin said."Faced with the real threat of terrorism today,we must remain faithful to tile memory of our fathers。It is our duty to defend a world order based ON security and justice and on a new culture of relations among nations that will not allow a repeat of any war,neither‘cold'nor ‘hot',"he continued.

3 The Second World War is perhaps the most catastrophic(灾难性的)event that mankind has ever suffered.The war affected 80 per cent of the world's people at that time,from 6 1 countries,and claimed 55 million lives.

6 President Hu and the other leaders also joined a wreath(花圈)laying ceremony at the Tomb of the Unknown Soldiers on' Monday.

第 23 题 Paragraphs 2__________

A．Pacific war

B．Gloomy world

C．Putin'S commemorating speech

D．China'S determination

E．Schroeder'S plea for forgiveness

F．World'S worst disaster

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第6题

听力原文：M: How do Jane and Bill like their new home？W: It's really comfortable, but they'

听力原文：M: How do Jane and Bill like their new home？

W: It's really comfortable, but they're tired of having to hear the jets go over their house at all hours.

Q: What is located close to Jane and Bill's new home？

(16)

A．A bus station.

B．An airport.

C．A super highway.

D．A train station.

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第7题

The new large passenger jets have made the traffic problems at airports ().

A.more bad than it was

B.the worse than before

C.worse than ever before

D.more bad than they were

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第8题

听力原文：M: How do Jane and Bill like their new home？W: It's realty comfortable, but they

听力原文：M: How do Jane and Bill like their new home？

W: It's realty comfortable, but they are tired of having to hear the jets go over their house at all hours.

Q: What is located close to Jane and Bill's new home？

(3)

A．A bus station.

B．An airport.

C．A super highway.

D．A train station.

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第9题

听力原文：M: How do Jane and Bill like their new home？W: It's really comfortable, but they'

听力原文：M: How do Jane and Bill like their new home？

W: It's really comfortable, but they're tired of having to hear the jets go over their house at all hours.

Q: What is located close to Jane and Bill's new home？

(13)

A．A train station.

B．An airport.

C．A bus station.

D．A super highway.

点击查看答案

第10题

听力原文：A fighter is always in pursuit of light. Instead of basking in the sunshine under

a clear sky, he holds a burning torch in the darkness of night to illuminate people's way so that they can continue their journey till they see the dawn of a new day. It is the task of a fighter to dispel darkness. Instead of shirking darkness, he braves it and fights the hidden demons and monsters therein. He is determined to wipe them out and win light. He knows no compromise. He will keep on fighting until he wins light.

______

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