A technique that controls immediate gas explosions by spraying them with large droplets of water is being tested by scientists at the University of Wales, United Kingdom．Instead of using the traditional fine water sprays when a gas leak is detected, the researchers have discovered that large droplets help to draw in some of the force of any explosion and provide a better way of controlling fire．

The research is based on studies made of the Piper Alpha oil rig （油井） explosion that occurred in the North Sea nine years ago killing 167 workers．The Welsh team found that by covering the gas-leak area with water droplets, the explosion and its effect can be greatly reduced．

Dr Gerand Thomas, a good lecturer in physics at the university’s Center for Explosion Studies, said that it was impossible to deal with gas explosions in the same way as fires because the whole event may only last a quarter of a second and normal water sprays do not have time to be effective．

Using the droplets of water to hold explosions resulted in the water being turned into a mist that allows some force of the explosion to be reduced．The mist slows down the combustion （燃烧） process and can stop a large amount of the gas igniting （点火,燃烧）, thus greatly reducing damage by limiting pressure development．With such a system, the operator has to decide at what point after a gas leak to activate the sprays．

The Center for Explosion Studies is the first of its kind in the UK and has been purposely-built for the study and implication of industrial explosions on land and sea．Research is developed to the causes of accidental explosions and they might be prevented．Full-sized imitative buildings can be built at the center where explosions and fires are created to test preventative equipment using sensors to monitor their efficiency．

Another area that the Welsh researchers have been looking at is how materials respond to explosions．The center also carries out research requested by individual customers．

Which of the following would be the best title for the passage?

     A．Piper Alpha Oil Rig Explosion

     B．Large Droplets of Water

     C．A New Way of Controlling Gas Explosions

     D．The center for Explosion Studies

The research finds that _____ in holding immediate explosion．

     A．small water sprays are better than large droplets of water

     B．small water sprays are not as good as large droplets of water

     C．both small water sprays and large droplets of water are good

     D．neither small water sprays nor large droplets of water is good

Dr Geraint Thomas implies that ______．

     A．normal water sprays can put out fire effectively

     B．gas explosions break out more quickly than fires

     C．fires are easier to be held than explosions

     D．gas explosions break out so quickly that there is no way to control it

Which of the following is not included in the research area of the Center for Explosion Studies?

     A．To test the result of gas explosion．

     B．To get some implications of industrial explosions on land and sea．

     C．To find out how materials respond to explosions．

    D．To find out when material respond to explosions．

C

A technique that controls immediate gas explosions by spraying them with large droplets of water is being tested by scientists at the University of Wales, United Kingdom．Instead of using the traditional fine water sprays when a gas leak is detected, the researchers have discovered that large droplets help to draw in some of the force of any explosion and provide a better way of controlling fire．

The research is based on studies made of the Piper Alpha oil rig （油井） explosion that occurred in the North Sea nine years ago killing 167 workers．The Welsh team found that by covering the gas-leak area with water droplets, the explosion and its effect can be greatly reduced．

Dr Gerand Thomas, a good lecturer in physics at the university’s Center for Explosion Studies, said that it was impossible to deal with gas explosions in the same way as fires because the whole event may only last a quarter of a second and normal water sprays do not have time to be effective．

Using the droplets of water to hold explosions resulted in the water being turned into a mist that allows some force of the explosion to be reduced．The mist slows down the combustion （燃烧） process and can stop a large amount of the gas igniting （点火,燃烧）, thus greatly reducing damage by limiting pressure development．With such a system, the operator has to decide at what point after a gas leak to activate the sprays．

The Center for Explosion Studies is the first of its kind in the UK and has been purposely-built for the study and implication of industrial explosions on land and sea．Research is developed to the causes of accidental explosions and they might be prevented．Full-sized imitative buildings can be built at the center where explosions and fires are created to test preventative equipment using sensors to monitor their efficiency．

Another area that the Welsh researchers have been looking at is how materials respond to explosions．The center also carries out research requested by individual customers．

64．Which of the following would be the best title for the passage?

     A．Piper Alpha Oil Rig Explosion

     B．Large Droplets of Water

     C．A New Way of Controlling Gas Explosions

     D．The center for Explosion Studies

65．The research finds that _____ in holding immediate explosion．

     A．small water sprays are better than large droplets of water

     B．small water sprays are not as good as large droplets of water

     C．both small water sprays and large droplets of water are good

     D．neither small water sprays nor large droplets of water is good

66．Dr Geraint Thomas implies that ______．

     A．normal water sprays can put out fire effectively

     B．gas explosions break out more quickly than fires

     C．fires are easier to be held than explosions

     D．gas explosions break out so quickly that there is no way to control it

67．Which of the following is not included in the research area of the Center for Explosion Studies?

     A．To test the result of gas explosion．

     B．To get some implications of industrial explosions on land and sea．

     C．To find out how materials respond to explosions．

     D．To find out when material respond to explosions．

Careercast.com is out with its list of best and worst jobs of 2012. It’s bad news for the writer of this story, but much brighter for the folks who program the code that keeps this website busy.
Using a method that looked at physical demands, work environment, income, stress and hiring outlook, career Website Careercast.com, ranked the top 200 jobs. They also ranked the jobs with the most stress. Not surprisingly, none of the most stressful jobs show up on the best jobs list.
At the top is software engineer and at the bottom is the lumberjack. Cutting trees failed to skate above the bottom 10 percent in all ranking categories, except income. “Unemployment for lumberjacks is very high, and the demand for their services is expected to continue to fall through 2016. And while working outside all day may seem like a great job perk(有额外津贴的工作), being a lumberjack not only is considered the worst job, but also one of the world’s most dangerous,” according to Careercast.com. And, for that most dangerous job, a lumberjack earns a little more than $32,000 a year. That’s about $56,000 less than the easy job of a software engineer, which has the average salary at $88,000 a year, according to Careercast.
Here’s a complete look at the best and worst jobs. And, take a look at the most stressful jobs. You may be surprised.
Best Jobs                     Worst Jobs             Most Stressful Jobs
Software Engineer                   Lumberjack              Enlisted Soldier
Actuary                         Dairy Farmer                Firefighter
Human Resources Manager         Enlisted Military Soldier       Airline Pilot
Dental Hygienist                    Oil Rig Worker         Military General
Financial Planner                   Reporter (Newspaper)        Police Officer
Audiologist                     Waiter/Waitress         Event Coordinator
Occupational Therapist              Meter Reader                Public Relations Executive
Online Advertising Manager          Dishwasher              Corporate Executive Computer Systems Analyst          Butcher                 Photojournalist
Mathematician                       Broadcaster             Taxi Driver
【小题1】Who might be most interested in the passage?

Careercast.com is out with its list of best and worst jobs of 2012. It’s bad news for the writer of this story, but much brighter for the folks who program the code that keeps this website busy.
Using a method that looked at physical demands, work environment, income, stress and hiring outlook, career Website Careercast.com, ranked the top 200 jobs. They also ranked the jobs with the most stress. Not surprisingly, none of the most stressful jobs show up on the best jobs list.
At the top is software engineer and at the bottom is the lumberjack. Cutting trees failed to skate above the bottom 10 percent in all ranking categories, except income. “Unemployment for lumberjacks is very high, and the demand for their services is expected to continue to fall through 2016. And while working outside all day may seem like a great job perk(有额外津贴的工作), being a lumberjack not only is considered the worst job, but also one of the world’s most dangerous,” according to Careercast.com. And, for that most dangerous job, a lumberjack earns a little more than $32,000 a year. That’s about $56,000 less than the easy job of a software engineer, which has the average salary at $88,000 a year, according to Careercast.
Here’s a complete look at the best and worst jobs. And, take a look at the most stressful jobs. You may be surprised.
Best Jobs                     Worst Jobs             Most Stressful Jobs
Software Engineer                   Lumberjack              Enlisted Soldier
Actuary                         Dairy Farmer                Firefighter
Human Resources Manager         Enlisted Military Soldier       Airline Pilot
Dental Hygienist                    Oil Rig Worker         Military General
Financial Planner                   Reporter (Newspaper)        Police Officer
Audiologist                     Waiter/Waitress         Event Coordinator
Occupational Therapist              Meter Reader                Public Relations Executive
Online Advertising Manager          Dishwasher              Corporate Executive Computer Systems Analyst          Butcher                 Photojournalist
Mathematician                       Broadcaster             Taxi Driver

1. 1.

   Who might be most interested in the passage?

   1. A.
      Job-hunters.
   2. B.
      Net surfers.
   3. C.
      Employers.
   4. D.
      Educators.
2. 2.

   Which of the following was not considered when Careercast.com ranked the top 200 jobs?

   1. A.
      Hiring outlook.
   2. B.
      Pressure.
   3. C.
      Mental demands.
   4. D.
      Salary.
3. 3.

   What do we know about the lumberjack?

   1. A.
      Although the lumberjack has high unemployment, it isn’t considered the worst job.
   2. B.
      On the best jobs list, the lumberjack isn’t at the bottom.
   3. C.
      More lumberjacks’ services will be needed after 2016.
   4. D.
      A lumberjack earns less than half of a software engineer’s salary a year.
4. 4.

   According to the passage, the list is good news for ______.

   1. A.
      Online Advertising Managers.
   2. B.
      Reporters.
   3. C.
      Firefighters.
   4. D.
      Dairy Farmers.
5. 5.

   What is the main purpose of the passage?

   1. A.
      To describe the advantages of different careers.
   2. B.
      To provide career information.
   3. C.
      To explain why a software engineer is the best job.
   4. D.
      To analyze why a lumberjack is the worst job.