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A dam is a man-made structure built across a river. Most dams are built to control a river’s water flow, improve navigation and control flooding. However, some dams are built to produce hydro-electric power.
Hydro-electric power is produced as water passes through a dam, and into a river below. The more water that passes through a dam, the more energy is produced. Once a dam is built, a man-made lake is created behind the dam.
Electricity is produced by a kind of equipment called a turbine(水轮机). Turbines contain metal coils(线圈) surrounded by magnets(磁铁). When the magnets move round rapidly over the metal coils, electricity is produced. Turbines are located inside dams. The falling water makes the magnets go around the coils.
Dams provide clean energy, but they can also harm the environment. Species that use rivers to reproduce are often hurt by dams. In the Northwest of the US, the population of fishes has dropped from 16 million to 2.5 million since hydro-electric plants were built on the Columbia River. Dams all over the world have hurt some species.
The highest dam in the Unites States is located near Oroville, California. The Oroville Dam towers 230 meters and is more than a mile wide. This dam was built in 1968, 22 years after the Hoover Dam. The Hoover Dam, on the Nevada-Arizona border controls the Colorado river. It is 221 meters high and has 2.6 million hectare-meters of water.
The highest dam in the world is the Nurek Dam on the Vakhsh River in Tadzikistan, a country in central Asia. This dam is 300 meters tall.
Which of the following statements is NOT true according to the passage?
A. Some dams are built for controlling a river’s water flow.
B. Hydro-electric power is usually produced through a dam.
C. Dams can offer energy and they are harmless to the environment.
D. Generally speaking, where there is a dam, there is a man-made lake.
The third paragraph mainly tells us _____.
A. how hydro-electric power is produced
B. What a turbine is and how it works
C. how the magnets and the metal coils work
D. how the falling water passes through a turbine
The dam which controls the Colorado river is ____.
A. the Oroville Dam B. the Hoover Dam C. the Nurek Dam D. the Vakhsh Dam
查看习题详情和答案>>A dam is a man-made structure built across a river. Most dams are built to control a river’s water flow, improve navigation and control flooding. However, some dams are built to produce hydro-electric power.
Hydro-electric power is produced as water passes through a dam, and into a river below. The more water that passes through a dam, the more energy is produced. Once a dam is built, a man-made lake is created behind the dam.
Electricity is produced by a kind of equipment called a turbine(水轮机). Turbines contain metal coils(线圈) surrounded by magnets(磁铁). When the magnets move round rapidly over the metal coils, electricity is produced. Turbines are located inside dams. The falling water makes the magnets go around the coils.
Dams provide clean energy, but they can also harm the environment. Species that use rivers to reproduce are often hurt by dams. In the Northwest of the US, the population of fishes has dropped from 16 million to 2.5 million since hydro-electric plants were built on the Columbia River. Dams all over the world have hurt some species.
The highest dam in the Unites States is located near Oroville, California. The Oroville Dam towers 230 meters and is more than a mile wide. This dam was built in 1968, 22 years after the Hoover Dam. The Hoover Dam, on the Nevada-Arizona border controls the Colorado river. It is 221 meters high and has 2.6 million hectare-meters of water.
The highest dam in the world is the Nurek Dam on the Vakhsh River in Tadzikistan, a country in central Asia. This dam is 300 meters tall.
Which of the following statements is NOT true according to the passage?
A. Some dams are built for controlling a river’s water flow.
B. Hydro-electric power is usually produced through a dam.
C. Dams can offer energy and they are harmless to the environment.
D. Generally speaking, where there is a dam, there is a man-made lake.
The third paragraph mainly tells us _____. 56-60 ADB
A. how hydro-electric power is produced
B. What a turbine is and how it works
C. how the magnets and the metal coils work
D. how the falling water passes through a turbine
The dam which controls the Colorado river is ____.
A. the Oroville Dam B. the Hoover Dam C. the Nurek Dam D. the Vakhsh Dam
查看习题详情和答案>>| A dam is a man-made structure built across a river. Most dams are built to control a river’s water flow, improve navigation and control flooding. However, some dams are built to produce hydro-electric power. Hydro-electric power is produced as water passes through a dam, and into a river below. The more water that passes through a dam, the more energy is produced. Once a dam is built, a man-made lake is created behind the dam. Electricity is produced by a kind of equipment called a turbine(水轮机). Turbines contain metal coils(线圈) surrounded by magnets(磁铁). When the magnets move round rapidly over the metal coils, electricity is produced. Turbines are located inside dams. The falling water makes the magnets go around the coils. Dams provide clean energy, but they can also harm the environment. Species that use rivers to reproduce are often hurt by dams. In the Northwest of the US, the population of fishes has dropped from 16 million to 2.5 million since hydro-electric plants were built on the Columbia River. Dams all over the world have hurt some species. The highest dam in the world is the Nurek Dam on the Vakhsh River in Tadzikistan, a country in central Asia. This dam is 300 meters tall. 1. Which of the following statements is NOT true according to the passage? A. Some dams are built for controlling a river’s water flow. B. Hydro-electric power is usually produced through a dam. C. Dams can offer energy and they are harmless to the environment. D. Generally speaking, where there is a dam, there is a man-made lake. 2. The third paragraph mainly tells us _____. A. how hydro-electric power is produced B. What a turbine is and how it works C. how the magnets and the metal coils work D. how the falling water passes through a turbine 3. The dam which controls the Colorado river is ____. A. the Oroville Dam B. the Hoover Dam C. the Nurek Dam D. the Vakhsh Dam |
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The people below are all looking for books to help themselves. After the description of these people, there is information about six books A---F. Decide which book would be most suitable for the person mentioned in questions 61---65 and mark the correct letter (A---F) on your answer sheet. There is one extra paragraph which you do not need to use.
_____ Jim bought a home computer earlier this year and he’s become very enthusiastic about it, spending hours each evening ‘playing’ with it as his wife says. Unfortunately, he’s
getting a bit forgetful about things he’s promised to do!
___ Freda prefers action to reading or watching TV. She is planning to redecorate the
living room and she isn’t expecting any help from others!
____ Susan Laughton is taking ‘A’ Levels in English, History and Art next year and if she passes, she’s hoping to become a teacher.
____Tony is very interested in animals and at the moment he wants to be a vet (a doctor for animals) when he grows up.
___ Jessica loves flowers, though, as her family lives in a second floor flat, there’s no
garden for her to grow anything in.
A: Book One
By Rachel Lawson
Over 100 color photographs, $ 22.00
Written to accompany an exciting new 13-part ITV television series, Nature Watch, this book describes the people who spend their lives working with the birds, animals and plants in various parts of the world. Their enthusiasm is brought to life with their own outstanding color photographs. Hints on nature watching for the amateur are found throughout.
B: Book Two
By Bob Dillard
150 color photographs and 490 color pictures, $ 16.50
Just the book for the job! With over 600 color photographs and pictures it covers the most popular DIY tasks around the home---painting, wall coverings, finishing furniture and woodwork, and putting up shelves. Full of handy tips and clear instructions
C: Book Three
By Will Smith, $ 7.5
Week to a page. A truly delightful family science magazine, each issue brings to light new software to make time before the screen interesting. This pocket diary provides a wide range of information for the enthusiast. Try it for 3 weeks for just 6.6. You can save 0.9.
D: Book Four
By Martin Ferguson
Color throughout, Paperback $ 9.5
Another title in the popular and practical Learn to Paint series, this beautifully illustrated book show you how to paint animals, birds, fish and butterflies in the studio and in the field. Every issue contains plenty of usable samples and provides a free photography page.
E: Book Five
By Cynthia Wildman
12 double-page color paintings 170 line drawings, $ 17.8
A fresh and useful approach to indoor gardening. A month-by-month guide to jobs to do, plants to look for, planning ahead and enjoying seasonal variations — to give year-round color in the home. Illustrated by original paintings for each month.
F: Book Six
By Conrad Ellis & Richard Hopkins, Paperback $ 9.8
A guide to success in written work, study and examinations for students in all subjects at colleges, and universities. Topics covered include: grammar, punctuation, and spelling; sentence and paragraph structure; research and library work; charts and diagrams; essays, reports, and exams; letters and application forms; listening and note-taking; talking and reading skills.
查看习题详情和答案>>The people below are all looking for books to help themselves. After the description of these people, there is information about six books A---F. Decide which book would be most suitable for the person mentioned in questions 1---5 and mark the correct letter (A---F) on your answer sheet. There is one extra paragraph which you do not need to use.
1. Jim bought a home computer earlier this year and he’s become very enthusiastic about it, spending hours each evening ‘playing’ with it as his wife says. Unfortunately, he’s getting a bit forgetful about things he’s promised to do!
2. Freda prefers action to reading or watching TV. She is planning to redecorate the lounge and she isn’t expecting any help from others!
3. Susan Laughton is taking ‘A’ Levels in English, History and Art next year and if she passes, she’s hoping to become a teacher.
4. Tony is very interested in animals and at the moment he wants to be a vet (a doctor for animals) when he grows up.
5.Jessica loves flowers, though, as her family lives in a second floor flat, there’s no garden for her to grow anything in.
A: Book One
By Rachel Lawson
Over 100 color photographs, $ 22.00
Written to accompany an exciting new 13-part ITV television series, Nature Watch, this book describes the people who spend their lives working with the birds, animals and plants in various parts of the world. Their enthusiasm is brought to life with their own outstanding color photographs. Hints on nature watching for the amateur are found throughout.
B: Book Two
By Bob Dillard
150 color photographs and 490 color pictures, $ 16.50
Just the book for the job! With over 600 color photographs and pictures it covers the most popular DIY tasks around the home---painting, wall coverings, finishing furniture and woodwork, and putting up shelves. Full of handy tips and clear instructions
C: Book Three
By Will Smith, $ 7.5
Week to a page. A truly delightful family science magazine, each issue brings to light new software to make time before the screen interesting. This pocket diary provides a wide range of information for the enthusiast. Try it for 3 weeks for just 6.6. You can save 0.9.
D: Book Four
By Martin Ferguson
Color throughout, Paperback $ 9.5
Another title in the popular and practical Learn to Paint series, this beautifully illustrated book show you how to paint animals, birds, fish and butterflies in the studio and in the field. Every issue contains plenty of usable samples and provides a free photography page.
E: Book Five
By Cynthia Wildman
12 double-page color paintings 170 line drawings, $ 17.8
A fresh and useful approach to indoor gardening. A month-by-month guide to jobs to do, plants to look for, planning ahead and enjoying seasonal variations---to give year-round color in the home. Illustrated by original paintings for each month.
F: Book Six
By Conrad Ellis & Richard Hopkins, Paperback $ 9.8
A guide to success in written work, study and examinations for students in all subjects at colleges, and universities. Topics covered include: grammar, punctuation, and spelling; sentence and paragraph structure; research and library work; charts and diagrams; essays, reports, and exams; letters and application forms; listening and note-taking; talking and reading skills.
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