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根据材料，完成题。Air Transportation1. Airplanes are used to carry passengers， cargo and mai

根据材料，完成题。

Air Transportation

1. Airplanes are used to carry passengers， cargo and mail. Air transport companies operate scheduled airlines and non-scheduled services over local， regional， national， and international routes. The aircraft operated by these companies range from small single-engine planes to large multiengine jet transports.

2. The first air passenger services began in 1910， when dirigibles began operation between several German cities. The first scheduled airplane service to carry passengers began in the U. S in 1914. Several experimental airmail flights took place in India， Europe， and the United States before World War I， but air transport service did not become a true business until after the war.

3. During World War Two， intercontinental air transport became firmly established. After the war the new long-distance transports with advanced facilities were increasingly able to avoid storms and strong wind and make flights more economical and consistent. A new generation of "jumbo-jet" transports began operations in 1970， and the supersonic transport entered passenger service in 1976.

4. During the 1970s the number of domestic passengers on U. S airlines increased about 78%， and during the 1980s the figure was up about 58%. In 1990 there were 41.8 million international passengers， the figure was a 75% increase over 1980. The total cargo flown by U. S airlines almost doubled during the 1980s， from 5.7 billion to 10.6 billion ton-miles in 1990.

5. Major airports provide a wide range of facilities for the convenience of millions of travelers. These range from such basic services as ticket-sales counters and restaurants to luxury hotels， shopping centers and play areas for children. International airports must also have customs areas and currency exchange counters and so on.

Paragraph 2__________. 查看材料

A.Airport services

B.Training of pilots

C.Beginning period

D.Rapid growth in the U.S.

E.Development

F.Competition

答案

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发布时间：2021-06-19

更多“根据材料，完成题。Air Transportation1. Airplanes are used to carry passengers， cargo and mai”相关的问题

第1题

根据下列阅读材料，回答 41～45 题：第 41 题 That boys suffer more from air pollution c

根据下列阅读材料，回答 41～45 题：

根据下列阅读材料，回答 41～45 题：第 41 题 That boys suffer more

根据下列阅读材料，回答 41～45 题：第 41 题 That boys suffer more

根据下列阅读材料，回答 41～45 题：第 41 题 That boys suffer more

根据下列阅读材料，回答 41～45 题：第 41 题 That boys suffer more

第 41 题 That boys suffer more from air pollution can possibly be justified by the fact that __________.

根据下列阅读材料，回答 41～45 题：第 41 题 That boys suffer more

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第2题

根据下列材料请回答 23～30 题：Ways to Reduce Exposure to Air Pollution1 A report published r

根据下列材料请回答 23～30 题：

Ways to Reduce Exposure to Air Pollution

1 A report published recently brings bad news about air pollution．It suggests that it could be as damaging to our health as exposure to the radiation from the 1 986 Ukraine nuclear power plant disaster．The report was published by the UK’S Royal Commission on Environmental Pollution．But what can city people do to reduce exposure to air pollution？ Quite a lot，it turns out．

2 Avoid walking in busy streets．Choose side streets and parks instead．Pollution levels can fall a considerable amount just by moving a few meters away from the main pollution source—exhaust furies(废气)．Also don’t walk behind smokers．Walk on the windward(顶风的)side of the street where exposure of pollutants(污染物)can be 50 percent less than on the downwind(顺风的)side．

3 Sifting on the driver'S side of a bus can increase your exposure by 10 percent，compared with sitting on the side realest the pavement．Sifting upstairs on a double—decked(双层电车)can reduce exposure．It is difficult to say whether traveling on an underground train is better or worse than taking the bus．Air pollution on underground trains tends to be less toxic(有毒的)than that at street level，because underground pollution is mostly made up of tiny iron particles(粒子)thrown up by wheels hitting the rails，while diesel(柴油机)and petrol fumes have a mixture of pollutants．

4 When you are crossing a road，stand well back from the curb(路缘)while you wait for the light to change。Every meter really does count when you are close to traffic．As the traffic begins to move，fumes can be reduced in just a few seconds。So holding your breath for just a moment can make a difference，even though it might sound silly．

5 There are large sudden pollution increases during rush hours．Pollution levels fall during nighttime．The time of year also makes a big difference．Pollution levels tend to be at their lowest during spring and autumn when winds are freshest．Extreme cold or hot weather has a trapping effect and tends to cause a build—up of pollutants．

第 23 题 Paragraph 2_________

A When you get up

B Where you stand while waiting to cross a road

C Where you walk

D Where you sit on a bus and how you travel

E When you go to bed

F When pollution levels rise and fall

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第3题

根据下列材料回答 96～100 题: 2009年1—4月我国完成城镇固定资产投资为37082.30亿元，比去年同

根据下列材料回答 96～100 题:

2009年1—4月我国完成城镇固定资产投资为37082.30亿元，比去年同期增长30.5%，其中第一产业比去年同期增长82.1%，投资比重见下图。

根据下列材料回答 96～100 题: 2009年1—4月我国完成城镇固定资产投资为37082.30亿

2009年1—4月我国完成城镇固定资产投资比重

第 96 题 2009年1—4月我国完成城镇固定资产投资中第三产业多少亿元？（）

根据下列材料回答 96～100 题: 2009年1—4月我国完成城镇固定资产投资为37082.30亿

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第4题

回答（50）题查看材料A.High sound of 150 decibels can kil

回答（50）题查看材料

A.High sound of 150 decibels can kill a healthy rat.

B.The vibration of air can produce infrasonic waves.

C.We cannot play high-pitched music with ordinary musical instruments.

D.If the intensity of infrasonic wave exceeds 160 decibels， it is extremely harmful.

E.Dolphins， whales and bats can make such high-frequency sound.

F.Therefore， the sound of ordinary musical instruments cannot harm your health.

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第5题

根据材料回答下列各题： It can be inferred from the first paragraph that______.A.water

根据材料回答下列各题：根据材料回答下列各题： It can be inferred from the first para It can be inferred from the first paragraph that______.

A.water vapor is an air pollutant in localized areas

B.the definition of air pollutiom will continue to change

C.a substance becomes an air pollutant only in cities

D.most air pollutants today can be seen or smelled

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第6题

根据录音，选择合适的答案（）查看材料A.Somethingiswr

根据录音，选择合适的答案（）查看材料

A.Something is wrong with the air conditioner．

B.The man is going to fix the air conditioner．

C.The woman can use the air conditioner for free．

D.The woman is worried about the quality．

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第7题

根据下列文章，回答 46～50 题。第 46 题 As pointed out at the beginning of the passage

根据下列文章，回答 46～50 题。

根据下列文章，回答 46～50 题。第 46 题 As pointed out at the be

第 46 题 As pointed out at the beginning of the passage．people used to think that air pollution_____

根据下列文章，回答 46～50 题。第 46 题 As pointed out at the be

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第8题

根据下面内容，回答题：Earth is the only 21 we know of in the universe that can support huma

根据下面内容，回答题：

Earth is the only 21 we know of in the universe that can support human life.22 human activities are making the planet less fit to live on. As the western world 23 on consuming two-thirds of the world" s resources while half of the world" s population do so 24 to stay alive we are rapidly destroying the 25 resource we have by which all people can survive and prosper.

Everywhere fertile soil is 26 built on or washed into the sea. Renewable resources are exploited so much that they will never be able to recover 27 We discharge pollutants 28 the atmosphere without any thought of the consequences. As a 29 the planet" s ability to support people is being 30 at the very time when rising human numbers and consumption are 31 increasingly heavy demands on it. The Earth" s 32 resources are there for us to use. We need food， water， air， energy， medicines， warmth， shelter and minerals to 33 us fed， comfortable， healthy and active. If we are sensible in how we use the resources they will 34 indefinitely. But if we use them wastefully and excessively they will soon run 35 and everyone will suffer.

材料题请点击右侧查看材料问题查看材料

A.situation

B.place

C.position

D.site

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第9题

回答（49）题查看材料A.High sound of 150 decibels can kil

回答（49）题查看材料

A.High sound of 150 decibels can kill a healthy rat.

B.The vibration of air can produce infrasonic waves.

C.We cannot play high-pitched music with ordinary musical instruments.

D.If the intensity of infrasonic wave exceeds 160 decibels， it is extremely harmful.

E.Dolphins， whales and bats can make such high-frequency sound.

F.Therefore， the sound of ordinary musical instruments cannot harm your health.

点击查看答案

第10题

回答（48）题查看材料A.High sound of 150 decibels can kil

回答（48）题查看材料

A.High sound of 150 decibels can kill a healthy rat.

B.The vibration of air can produce infrasonic waves.

C.We cannot play high-pitched music with ordinary musical instruments.

D.If the intensity of infrasonic wave exceeds 160 decibels， it is extremely harmful.

E.Dolphins， whales and bats can make such high-frequency sound.

F.Therefore， the sound of ordinary musical instruments cannot harm your health.

点击查看答案

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