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下述何种天气现象标志着雷暴已进入成熟阶段()。

A
地面开始下雨
B
出现了强上升气流
C
云体增长速度达到最大
D
出现了混乱的低云

答案解析

正确答案:A
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Domestic airline passengers will be able to make phone calls and send e-mails from the sky from next year, a local carrier has said. Shenzhen Airlines said on Monday it has signed an agreement with Geneva-based On-Air to provide passengers with in-flight communications services on all its planes by the end of 2009. The service will be introduced on three aircraft ahead of the 2008 Olympics, on two routes----from Shenzhen to Beijing and Shenzhen to Shanghai, the airline said. Passengers will be able to use their own electronic devices to send e-mails and short messages, make calls and surf the Internet, it said. The service is expected to be of particular interest to business travelers. According to a survey at the end of last year, China had 4.55 million mobile-phone subscribers. Ninety-three percent of those polled said they wished they could send and receive e-mails and messages while on a plane. Despite the introduction of the new service, passengers will still be prevented from using their cell phones and laptops when the plane is taking off and landing, or flying at less than 3,000 m above sea level, the official said. The official said the new service would not lead to an increase in ticket prices, but users of Chinese mobile-phone services will be charged the international roaming rate for any calls made from the sky. Shenzhen Airlines is the first Chinese carrier to provide such in-flight communications services. Its president, Li Kun, said installing the facilities will cost 4.5 million yuan ($596,000) per aircraft. However, the project still needs to be approved by the Civil Aviation Administration of China, a source said.3. Passengers will be able to send e-mails and short messages by .

单选题

Domestic airline passengers will be able to make phone calls and send e-mails from the sky from next year, a local carrier has said. Shenzhen Airlines said on Monday it has signed an agreement with Geneva-based On-Air to provide passengers with in-flight communications services on all its planes by the end of 2009. The service will be introduced on three aircraft ahead of the 2008 Olympics, on two routes----from Shenzhen to Beijing and Shenzhen to Shanghai, the airline said. Passengers will be able to use their own electronic devices to send e-mails and short messages, make calls and surf the Internet, it said. The service is expected to be of particular interest to business travelers. According to a survey at the end of last year, China had 4.55 million mobile-phone subscribers. Ninety-three percent of those polled said they wished they could send and receive e-mails and messages while on a plane. Despite the introduction of the new service, passengers will still be prevented from using their cell phones and laptops when the plane is taking off and landing, or flying at less than 3,000 m above sea level, the official said. The official said the new service would not lead to an increase in ticket prices, but users of Chinese mobile-phone services will be charged the international roaming rate for any calls made from the sky. Shenzhen Airlines is the first Chinese carrier to provide such in-flight communications services. Its president, Li Kun, said installing the facilities will cost 4.5 million yuan ($596,000) per aircraft. However, the project still needs to be approved by the Civil Aviation Administration of China, a source said.2. We can learn that the new service will be introduced .

单选题

Domestic airline passengers will be able to make phone calls and send e-mails from the sky from next year, a local carrier has said. Shenzhen Airlines said on Monday it has signed an agreement with Geneva-based On-Air to provide passengers with in-flight communications services on all its planes by the end of 2009. The service will be introduced on three aircraft ahead of the 2008 Olympics, on two routes----from Shenzhen to Beijing and Shenzhen to Shanghai, the airline said. Passengers will be able to use their own electronic devices to send e-mails and short messages, make calls and surf the Internet, it said. The service is expected to be of particular interest to business travelers. According to a survey at the end of last year, China had 4.55 million mobile-phone subscribers. Ninety-three percent of those polled said they wished they could send and receive e-mails and messages while on a plane. Despite the introduction of the new service, passengers will still be prevented from using their cell phones and laptops when the plane is taking off and landing, or flying at less than 3,000 m above sea level, the official said. The official said the new service would not lead to an increase in ticket prices, but users of Chinese mobile-phone services will be charged the international roaming rate for any calls made from the sky. Shenzhen Airlines is the first Chinese carrier to provide such in-flight communications services. Its president, Li Kun, said installing the facilities will cost 4.5 million yuan ($596,000) per aircraft. However, the project still needs to be approved by the Civil Aviation Administration of China, a source said.1. According to the report, passengers can on the plane by the end of 2009.

单选题

The Boeing 747-400 airplane has reached its cruising altitude of 10,000 meters and cruising speed of 900 km per hour on its way from London to Beijing. The Purser has announced that the passengers are now free to unfasten their seat belts and move around the cabin; however passengers should keep their seat belt fastened when seated. The passenger cabin layout consists of three sections. The 747-400 is unique in having two decks; on the upper deck, behind the flight crew there is the first class section. On the lower deck, at the front, the business class section, for passengers who pay the full fare: while behind is the much larger economy section for passengers who have special cheap rate tickets. The stewards and stewardesses—14 in all—are now busy around the galleys. A choice of drinks, followed by dinner, video entertainment including a film and finally breakfast in the morning is the order of service. Individual headphones are distributed, and these, when plugged in to the arm of the seat—give a variety of in-flight musical programs. Also in the arm of the seat are the controls for a personal reading light, fresh air control and call button. Dinner is served on specially prepared trays, perhaps prawn cocktail, followed by a choice of roast chicken or braised steak with chocolate mousse to finish. The chicken and beef has been heated in the special microwave ovens in the galleys. It is hard to believe that a hot, three-course meal can be served while the plane is flying at this altitude and speed. Dinner over, the cabin lights are dimmed, the blinds by the windows are drawn, the screens unfold and the film begins. Now, for the first time the cabin crew take it in turns to have a rest while the passengers watch the film or snooze dreaming of arriving in Beijing in the morning.5. During the film, the cabin attendants will ( ).

单选题

The Boeing 747-400 airplane has reached its cruising altitude of 10,000 meters and cruising speed of 900 km per hour on its way from London to Beijing. The Purser has announced that the passengers are now free to unfasten their seat belts and move around the cabin; however passengers should keep their seat belt fastened when seated. The passenger cabin layout consists of three sections. The 747-400 is unique in having two decks; on the upper deck, behind the flight crew there is the first class section. On the lower deck, at the front, the business class section, for passengers who pay the full fare: while behind is the much larger economy section for passengers who have special cheap rate tickets. The stewards and stewardesses—14 in all—are now busy around the galleys. A choice of drinks, followed by dinner, video entertainment including a film and finally breakfast in the morning is the order of service. Individual headphones are distributed, and these, when plugged in to the arm of the seat—give a variety of in-flight musical programs. Also in the arm of the seat are the controls for a personal reading light, fresh air control and call button. Dinner is served on specially prepared trays, perhaps prawn cocktail, followed by a choice of roast chicken or braised steak with chocolate mousse to finish. The chicken and beef has been heated in the special microwave ovens in the galleys. It is hard to believe that a hot, three-course meal can be served while the plane is flying at this altitude and speed. Dinner over, the cabin lights are dimmed, the blinds by the windows are drawn, the screens unfold and the film begins. Now, for the first time the cabin crew take it in turns to have a rest while the passengers watch the film or snooze dreaming of arriving in Beijing in the morning.4. Before the meal, the cabin attendants should heat ( ) in the ovens in the galley.

单选题

The Boeing 747-400 airplane has reached its cruising altitude of 10,000 meters and cruising speed of 900 km per hour on its way from London to Beijing. The Purser has announced that the passengers are now free to unfasten their seat belts and move around the cabin; however passengers should keep their seat belt fastened when seated. The passenger cabin layout consists of three sections. The 747-400 is unique in having two decks; on the upper deck, behind the flight crew there is the first class section. On the lower deck, at the front, the business class section, for passengers who pay the full fare: while behind is the much larger economy section for passengers who have special cheap rate tickets. The stewards and stewardesses—14 in all—are now busy around the galleys. A choice of drinks, followed by dinner, video entertainment including a film and finally breakfast in the morning is the order of service. Individual headphones are distributed, and these, when plugged in to the arm of the seat—give a variety of in-flight musical programs. Also in the arm of the seat are the controls for a personal reading light, fresh air control and call button. Dinner is served on specially prepared trays, perhaps prawn cocktail, followed by a choice of roast chicken or braised steak with chocolate mousse to finish. The chicken and beef has been heated in the special microwave ovens in the galleys. It is hard to believe that a hot, three-course meal can be served while the plane is flying at this altitude and speed. Dinner over, the cabin lights are dimmed, the blinds by the windows are drawn, the screens unfold and the film begins. Now, for the first time the cabin crew take it in turns to have a rest while the passengers watch the film or snooze dreaming of arriving in Beijing in the morning.3. During the flight, the cabin attendants should do the following except ( ).

单选题

The Boeing 747-400 airplane has reached its cruising altitude of 10,000 meters and cruising speed of 900 km per hour on its way from London to Beijing. The Purser has announced that the passengers are now free to unfasten their seat belts and move around the cabin; however passengers should keep their seat belt fastened when seated. The passenger cabin layout consists of three sections. The 747-400 is unique in having two decks; on the upper deck, behind the flight crew there is the first class section. On the lower deck, at the front, the business class section, for passengers who pay the full fare: while behind is the much larger economy section for passengers who have special cheap rate tickets. The stewards and stewardesses—14 in all—are now busy around the galleys. A choice of drinks, followed by dinner, video entertainment including a film and finally breakfast in the morning is the order of service. Individual headphones are distributed, and these, when plugged in to the arm of the seat—give a variety of in-flight musical programs. Also in the arm of the seat are the controls for a personal reading light, fresh air control and call button. Dinner is served on specially prepared trays, perhaps prawn cocktail, followed by a choice of roast chicken or braised steak with chocolate mousse to finish. The chicken and beef has been heated in the special microwave ovens in the galleys. It is hard to believe that a hot, three-course meal can be served while the plane is flying at this altitude and speed. Dinner over, the cabin lights are dimmed, the blinds by the windows are drawn, the screens unfold and the film begins. Now, for the first time the cabin crew take it in turns to have a rest while the passengers watch the film or snooze dreaming of arriving in Beijing in the morning.2. The passenger cabin layout consists of three sections. They are the followings except ( ).

单选题

The Boeing 747-400 airplane has reached its cruising altitude of 10,000 meters and cruising speed of 900 km per hour on its way from London to Beijing. The Purser has announced that the passengers are now free to unfasten their seat belts and move around the cabin; however passengers should keep their seat belt fastened when seated. The passenger cabin layout consists of three sections. The 747-400 is unique in having two decks; on the upper deck, behind the flight crew there is the first class section. On the lower deck, at the front, the business class section, for passengers who pay the full fare: while behind is the much larger economy section for passengers who have special cheap rate tickets. The stewards and stewardesses—14 in all—are now busy around the galleys. A choice of drinks, followed by dinner, video entertainment including a film and finally breakfast in the morning is the order of service. Individual headphones are distributed, and these, when plugged in to the arm of the seat—give a variety of in-flight musical programs. Also in the arm of the seat are the controls for a personal reading light, fresh air control and call button. Dinner is served on specially prepared trays, perhaps prawn cocktail, followed by a choice of roast chicken or braised steak with chocolate mousse to finish. The chicken and beef has been heated in the special microwave ovens in the galleys. It is hard to believe that a hot, three-course meal can be served while the plane is flying at this altitude and speed. Dinner over, the cabin lights are dimmed, the blinds by the windows are drawn, the screens unfold and the film begins. Now, for the first time the cabin crew take it in turns to have a rest while the passengers watch the film or snooze dreaming of arriving in Beijing in the morning.1. When the plane is flying, the passengers ( )when seated.

单选题

Nowadays almost every city has an airport, even two, in the case of some big cities. Like a railway station, an airport is a very busy place. At almost any hour of the day or night it is thronged with people, many of whom are passengers either waiting for a departing flight or who have just landed. Today, a great number of people travel from one country to another by plane just as routinely as other people move from one town to another within the same country by train or bus. The large building in which passengers wait for their flight is called the passenger terminal. When a passenger arrives at the terminal, he goes to the counter of the airline that has arranged his trip. There he shows his ticket as proof that he has a booking on the particular flight. He also gives up his heavy luggage to be tagged and sent to the hold of the aircraft. If his ticket is in order, and his luggage is not overweight, he is issued with a card called a boarding pass which allows him admission onto the plane. Following the announcement that the plane is ready for boarding, departing passengers go through departure gates, which control the entrance and exit of people on and off the aircraft. At these gates, after they have shown their passports and their boarding pass has been checked, they are allowed to board the waiting aircraft. Aircraft lands and takes off on a runway made of concrete. The runway of a modern airport is about three kilometers in length, as large jet planes take this distance to get airborne, or to come to a standstill after landing. Only one plane can land on or take off from a runway at a time. Specially trained officers, who sit in the control tower of the airport, strictly control the landing and take-off of aircraft. These air traffic controllers, as they are called, communicate with the pilots of the planes by radio. All modern planes are fitted with radar but the pilots still rely on the controllers to guide them. A mistake made by a controller in the tower may lead to a serious accident in which a large number of people may be injured or killed.5. Which of the following statements is NOT mentioned in this article?

单选题

Nowadays almost every city has an airport, even two, in the case of some big cities. Like a railway station, an airport is a very busy place. At almost any hour of the day or night it is thronged with people, many of whom are passengers either waiting for a departing flight or who have just landed. Today, a great number of people travel from one country to another by plane just as routinely as other people move from one town to another within the same country by train or bus. The large building in which passengers wait for their flight is called the passenger terminal. When a passenger arrives at the terminal, he goes to the counter of the airline that has arranged his trip. There he shows his ticket as proof that he has a booking on the particular flight. He also gives up his heavy luggage to be tagged and sent to the hold of the aircraft. If his ticket is in order, and his luggage is not overweight, he is issued with a card called a boarding pass which allows him admission onto the plane. Following the announcement that the plane is ready for boarding, departing passengers go through departure gates, which control the entrance and exit of people on and off the aircraft. At these gates, after they have shown their passports and their boarding pass has been checked, they are allowed to board the waiting aircraft. Aircraft lands and takes off on a runway made of concrete. The runway of a modern airport is about three kilometers in length, as large jet planes take this distance to get airborne, or to come to a standstill after landing. Only one plane can land on or take off from a runway at a time. Specially trained officers, who sit in the control tower of the airport, strictly control the landing and take-off of aircraft. These air traffic controllers, as they are called, communicate with the pilots of the planes by radio. All modern planes are fitted with radar but the pilots still rely on the controllers to guide them. A mistake made by a controller in the tower may lead to a serious accident in which a large number of people may be injured or killed.4. Who controls the landing and take-off of aircraft at the airport?

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