63.What does the passage mainly talk about? A.The advantages of “Nowcasts . B.A tornado in Edmonton, AlbertA. C.The difficulty in predicting tornado. D.A great development in weather forecast. 答案 BDAD Passage 69 (福建省三校2010届高三上学期期中联考) D Around the age of 40, honest people may already admit to noticing changes in their mental abilities. This is the beginning of a gradual decline that in all too many of us will end with full-blown dementia. However, a few drugs that might do the job, known as “cognitive enhancement , are already on the market, and a few dozen others are on the way. Perhaps the best-known is modafinil. Licensed to treat narcolepsy(嗜眠症), the condition that causes people to suddenly fall asleep, it has notable effects in healthy people too. Modafinil can keep a person awake and his or her attention fixed for 90 hours straight, with none of anxiety, nervousness and bad concentration. In fact, with the help of modafinil, people who can hardly go to sleep can perform even better than their well-rested, un-medicated(未服药的) selves. It’s an open secret that many, perhaps most, prescriptions for modafinil are written not for people who suffer from narcolepsy, but for those who simply want to stay awake. Similarly, many people are using Ritalin not because they suffer from attention problem or any other disorder, but because they want superior concentration during exams or heavy-duty activities. Some drugs have also been specially designed to improve memory. Many of these seem to work, and without any major side effects. So why aren’t we all on cognitive enhancers already? “We need to be careful what we wish for, says Daniele Piomelli at the University of California at Irvine. Repairing and improving memory may have unwanted effects, he warns. “Eventually we may end up remembering things we don’t want to. 查看更多

 

题目列表(包括答案和解析)

Many of the most damaging types of weather begin quickly, strike suddenly, and disappear rapidly, destroying small areas while leaving neighboring areas untouched. Such event as a tornado(龙卷风) struck the northeastern part of Edmonton, Alberta, in July 1987. Total damages from the tornado went beyond $ 250 million, the highest ever for any Canadian storm.

Traditional computer models of the atmosphere have limited value in predicting short-lived local storms like the Edmonton tornado, because the available weather data(数据)are generally not detailed (详细)enough to allow computers to study carefully the slight atmospheric changes that come before these storm. In most nations, for example, weather—balloon observations are taken just once every twelve hours at places separated by hundreds of miles. With such limited data, traditional forecasting models do a much better job predicting general weather conditions over large areas than they do forecasting specific local events.

Until recently, the observation intensive method needed for exact, very short—range forecasts, or “Nowcasts”, was not possible. The cost of equipping and operating many thousands of traditional weather stations was extremely high, and the difficulties concerned in rapidly collecting and processing the weather data from such a network were hard to overcome.

Fortunately, scientific and technological advances have overcome most of these problems. Radar(雷达) systems and satellites are all able to make detailed, nearly continuous observations over large areas at a lower cost. Communication satellites can send out data around the world cheaply and immediately, and modern computers can quickly collect and analyze this large amount of weather information.

Meteorologists(气象学者) and computer scientists now work together to design computer programs and video equipment able to change weather data into words and graphic displays(图解) that forecasters can understand easily and quickly. As meteorologists have begun using these new technologies in weather forecasting offices, nowcasting is becoming a reality.

1.Why can’t traditional computer models predict short-lived local storms?

       A.The weather data people collect are often wrong.

       B.Detailed weather data in some small areas are not available.

       C.The computers are not advanced enough to predict them.

       D.The computers are not used to forecast specific local events.

2.The word “Nowcast” in Paragraph 3 means          .

       A.a network to collect storm data

       B.a way of collecting weather data

       C.a more advanced system of weather observation

       D.a forecast which can predict weather in the small area.

3.What can make “Nowcasts” a reality according to the passage?

       A.Scientific and technological advances.

       B.Advanced computer programs.

       C.Computer scientists

       D.Meteorologists

4.What does the passage mainly talk about?

       A.The advantages of “Nowcasts”

       B.A tornado in Edmonton, Alberta.

       C.The difficulty in predicting tornados.

       D.A great development in weather forecast.

查看答案和解析>>

Many of the most damaging types of weather begin quickly, strike suddenly, and disappear rapidly, destroying small areas while leaving neighboring areas untouched.Such event as a tornado struck the northeastern part of Edmonton, Alberta, in July 1987.Total damages from the tornado went beyond $250 million, the highest ever for any Canadian storm.

Traditional computer models of the atmosphere have limited value in predicting short-lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the slight atmospheric changes that come before these storms.In most nations, for example, weather-balloon observations are taken just once every twelve hours at places separated by hundreds of miles.With such limited data, traditional forecasting models do a much better job predicting general weather conditions over large areas than they do forecasting specific local events.

Until recently, the observation intensive method needed for exact, very short-range forecasts, or “Nowcasts,” was not possible.The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties concerned in rapidly collecting and processing the weather data from such a network were hard to overcome.

Fortunately, scientific and technological advances have overcome most of these problems.Radar systems and satellites are all able to make detailed, nearly continuous observation over large areas at a lower cost.Communications satellites can send out data around the world cheaply and immediately, and modern computers can quickly collect and analyze this large amount of weather information.

Meteorologists(气象学者)and computer scientists now work together to design computer programs and video equipment able to change weather data into words and graphic displays that forecasters can understand easily and quickly.As meteorologists have begun using these new technologies in weather forecasting offices, Nowcasting is becoming a reality.

1.Why can’t traditional computer models predict short-lived local storms?

A.The weather data people collect are often wrong.

B.Detailed weather data in some small areas are not available.

C.The computers are not advanced enough to predict them.D.The computers are not used to forecast specific local events.

2.The word “Nowcast” in Paragraph 3 means ________.

A.a network to collect storm data?     

B.a way of collecting weather data

C.a more advanced system of weather observation

D.a forecast which can predict weather in the small area

3.What can make “Nowcasts” a reality according to the passage?

A.Scientific and technological advances. B.Advanced computer programs.

C.Computer scientists.?              D.Meteorologists.

4.What does the passage mainly talk about?

A.The advantages of “Nowcasts”.        B.A tornado in Edmonton, Alberta.

C.The difficulty in predicting tornado.  D.A great development in weather forecast.

 

查看答案和解析>>

Many of the most damaging types of weather begin quickly, strike suddenly, and disappear rapidly, destroying small areas while leaving neighboring areas untouched.Such event as a tornado struck the northeastern part of Edmonton, Alberta, in July 1987.Total damages from the tornado went beyond $250 million, the highest ever for any Canadian storm.

Traditional computer models of the atmosphere have limited value in predicting short-lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the slight atmospheric changes that come before these storms.In most nations, for example, weather-balloon observations are taken just once every twelve hours at places separated by hundreds of miles.With such limited data, traditional forecasting models do a much better job predicting general weather conditions over large areas than they do forecasting specific local events.

Until recently, the observation intensive method needed for exact, very short-range forecasts, or “Nowcasts,” was not possible.The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties concerned in rapidly collecting and processing the weather data from such a network were hard to overcome.

Fortunately, scientific and technological advances have overcome most of these problems.Radar systems and satellites are all able to make detailed, nearly continuous observation over large areas at a lower cost.Communications satellites can send out data around the world cheaply and immediately, and modern computers can quickly collect and analyze this large amount of weather information.

Meteorologists(气象学者)and computer scientists now work together to design computer programs and video equipment able to change weather data into words and graphic displays that forecasters can understand easily and quickly.As meteorologists have begun using these new technologies in weather forecasting offices, Nowcasting is becoming a reality.

1.Why can’t traditional computer models predict short-lived local storms?

A.The weather data people collect are often wrong.

B.Detailed weather data in some small areas are not available.

C.The computers are not advanced enough to predict them.D.The computers are not used to forecast specific local events.

2.The word “Nowcast” in Paragraph 3 means ________.

A.a network to collect storm data?     

B.a way of collecting weather data

C.a more advanced system of weather observation

D.a forecast which can predict weather in the small area

3.What can make “Nowcasts” a reality according to the passage?

A.Scientific and technological advances. B.Advanced computer programs.

C.Computer scientists.?               D.Meteorologists.

4.What does the passage mainly talk about?

A.The advantages of “Nowcasts”.         B.A tornado in Edmonton, Alberta.

C.The difficulty in predicting tornado.   D.A great development in weather forecast.

查看答案和解析>>

阅读理解

  Many of the most damaging types of weather begin quickly, strike suddenly, and disappear rapidly, destroying small areas while leaving neighboring areas untouched.Such event as a tornado(龙卷风)struck the northeastern part of Edmonton, Alberta, in July 1987.Total damages from the tornado went beyond $250 million, the highest ever for any Canadian storm.

  Traditional computer models of the atmosphere have limited value in predicting short-lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the slight atmospheric changes that come before these storms.In most nations, for example, weather-balloon observations are taken just once every twelve hours at places separated by hundreds of miles.With such limited data, traditional forecasting models do a much better job predicting general weather conditions over large areas than they do forecasting specific local events.

  Until recently, the observation intensive method needed for exact, very short-range forecasts, or “Nowcasts, ” was not possible.The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties concerned in rapidly collecting and processing the weather data from such a network were hard to overcome.

  Fortunately, scientific and technological advances have overcome most of these problems.Radar(雷达)systems and satellites are all able to make detailed, nearly continuous observation over large areas at a lower cost.Communications satellites can send out data around the world cheaply and immediately, and modern computers can quickly collect and analyze this large amount of weather information.

  Meteorologists(气象学者)and computer scientists now work together to design computer programs and video equipment able to change weather data into words and graphic displays(图解)that forecasters can understand easily and quickly.As meteorologists have begun using these new technologies in weather forecasting offices, nowcasting is becoming a reality.

(1)

Why can’t traditional computer models predict short-lived local storms?

[  ]

A.

The weather data people collect are often wrong.

B.

Detailed weather data in some small areas are not available.?

C.

The computers are not advanced enough to predict them.?

D.

The computers are not used to forecast specific local events.?

(2)

The word “Nowcast” in Paragraph 3 means ________.

[  ]

A.

a network to collect storm data?

B.

a way of collecting weather data

C.

a more advanced system of weather observation

D.

a forecast which can predict weather in the small area

(3)

What can make “Nowcasts” a reality according to the passage?

[  ]

A.

Scientific and technological advances.

B.

Advanced computer programs.

C.

Computer scientists.

D.

Meteorologists.?

(4)

What does the passage mainly talk about?

[  ]

A.

The advantages of “Nowcasts”.

B.

A tornado in Edmonton, AlbertA

C.

The difficulty in predicting tornado.

D.

A great development in weather forecast.

查看答案和解析>>


Many of the most damaging types of weather begin quickly, strike suddenly, and disappear rapidly, destroying small areas while leaving neighboring areas untouched.Such event as a tornado struck the northeastern part of Edmonton, Alberta, in July 1987.Total damages from the tornado went beyond $250 million, the highest ever for any Canadian storm.
Traditional computer models of the atmosphere have limited value in predicting short-lived local storms like the Edmonton tornado, because the available weather data are generally not detailed enough to allow computers to study carefully the slight atmospheric changes that come before these storms.In most nations, for example, weather-balloon observations are taken just once every twelve hours at places separated by hundreds of miles.With such limited data, traditional forecasting models do a much better job predicting general weather conditions over large areas than they do forecasting specific local events.
Until recently, the observation intensive method needed for exact, very short-range forecasts, or “Nowcasts,” was not possible.The cost of equipping and operating many thousands of conventional weather stations was extremely high, and the difficulties concerned in rapidly collecting and processing the weather data from such a network were hard to overcome.
Fortunately, scientific and technological advances have overcome most of these problems.Radar systems and satellites are all able to make detailed, nearly continuous observation over large areas at a lower cost.Communications satellites can send out data around the world cheaply and immediately, and modern computers can quickly collect and analyze this large amount of weather information.
Meteorologists(气象学者)and computer scientists now work together to design computer programs and video equipment able to change weather data into words and graphic displays that forecasters can understand easily and quickly.As meteorologists have begun using these new technologies in weather forecasting offices, Nowcasting is becoming a reality.
1.Why can’t traditional computer models predict short-lived local storms?
A.The weather data people collect are often wrong.
B.Detailed weather data in some small areas are not available.
C.The computers are not advanced enough to predict them.D.The computers are not used to forecast specific local events.
2.The word “Nowcast” in Paragraph 3 means ________.
A.a network to collect storm data?     
B.a way of collecting weather data
C.a more advanced system of weather observation
D.a forecast which can predict weather in the small area
3.What can make “Nowcasts” a reality according to the passage?
A.Scientific and technological advances. B.Advanced computer programs.
C.Computer scientists.?              D.Meteorologists.
4.What does the passage mainly talk about?
A.The advantages of “Nowcasts”.        B.A tornado in Edmonton, Alberta.
C.The difficulty in predicting tornado.  D.A great development in weather forecast.

查看答案和解析>>


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