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Wide World of Robots
Engineers who build and program robots have fascinating jobs. These researchers tinker（修补）with ma-
chines in the lab and write computer software to control these devices."They're the best toys out there,"
says Howie Choset at Carnegie Mellon University in Pittsburgh.Choset is a roboticist,a person who designs,
builds or programs robots.
When Choset was a kid,he was interested in anything that moved-cars,trains,animals.He put motors
on Tinkertoy cars to make them move.Later,in high school,he built mobile robots similar to small cars.
Hoping to continue working on robots,he studied computer science in college.But when he got to
graduate school at the California Institute of Technology in Pasadena,Choset's labmates were working on
something even cooler than remotely controlled cars:robotic snakes.Some robots can move only forward,
backward , left and right. But snakes can twist（扭曲）in many directions and travel over a lot of different
types of terrain（地形）."Snakes are far more interesting than the cars,"Choset concluded.
After he started working at Carnegie Mellon,Choset and his colleagues there began developing their own
snake robots.Choset'5 team programnied robots to perform the same movements as real snakes,such as
sliding and inching forward.The robots also moved in ways that snakes usually don't,such as rolling.
Choset's snake robots could crawl（爬行）through the grass ,swim in a pond and even climb a flagpole.
But Choset wondered if his snakes might be useful for medicine as well. For some heart surgeries,the
doctor has to open a patient' s chest ,cutting through the breastbone. Recovering from these surgeries can be
very painful. What if the doctor could perform the operation by instead making a small hole in the body and
sending in a thin robotic snake?
Choset teamed up with Marco Zenati,a heart surgeon now at Harvard Medical School ,to investigate the
idea. Zenati practiced using the robot on a plastic model of the chest and they tested the robot in pigs.
A company called Medrobotics in Boston is now adapting the technology for surgeries on people.
Even after 15 years of working with his team's creations,"I still don't get bored of watching the motion
of my robots,"Choset says.
Choset's snake robots could make more movements than the ones others developed.
A: Right
B: Wrong
C: Not mentioned
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Thirst for Oil
Worldwide every day,we devour the energy equivalent of about 200 million barrels of oil. Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet's surface each minute to cover our needs for an entire year,we just need to find an efficient way to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle,this will change,and we will need to cure our addiction to oil.
Burning wood satisfied most energy needs until the steam-driven industrial revolution,when energy-dense coal became the fuel of choice. Coal is still used,mostly in power sta-tions,to cover one quarter of our energy needs,but its use has been declining since we star-ted pumping up oil. Coal is the least efficient,unhealthiest and most environmentally dama-ging fossil fuel,but could make a comeback,as supplies are still plentiful:its reserves are five times larger than oil's.
Today petroleum,a mineral oil obtained from below the surface of the Earth and used to produce petrol,diesel oil and various other chemical substances,provides around 40% of the world's energy needs,mostly fuelling automobiles. The US consumes a quarter of all oil,and generates a similar proportion of greenhouse gas emissions.
The majority of oil comes from the Middle East,which has half of known reserves. But other significant sources include Russia,North America,Norway,Venezuela and the North Sea. Alaska's Arctic National Wildlife Refuge could be a major new US source,to reduce reliance on foreign imports.
Most experts predict we will exhaust easily accessible reserves within 50 years,though opinions and estimates vary. We could fast reach an energy crisis in the next few decades, when demand exceeds supply. As conventional reserves become more difficult to access,oth-ers such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.
Since we started using fossil fuels,we have released 400 billion tonnes of carbon,and burning the entire reserves could eventually raise world temperatures by 13℃ .Among other horrors,this would result in the destruction of all rainforests and the melting of all
Arctic ice.
What do experts say about the earth's fuel reserves?
A: The earth's fuel reserves will be accessible for the next 50 years.
B: There will soon be an energy crisis.
C: Conventional reserves will soon become inaccessible.
D: Fuel demand will decline.
Thirst for Oil
Worldwide every day,we devour the energy equivalent of about 200 million barrels of oil. Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet's surface each minute to cover our needs for an entire year,we just need to find an efficient way to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle,this will change,and we will need to cure our addiction to oil.
Burning wood satisfied most energy needs until the steam-driven industrial revolution,when energy-dense coal became the fuel of choice. Coal is still used,mostly in power sta-tions,to cover one quarter of our energy needs,but its use has been declining since we star-ted pumping up oil. Coal is the least efficient,unhealthiest and most environmentally dama-ging fossil fuel,but could make a comeback,as supplies are still plentiful:its reserves are five times larger than oil's.
Today petroleum,a mineral oil obtained from below the surface of the Earth and used to produce petrol,diesel oil and various other chemical substances,provides around 40% of the world's energy needs,mostly fuelling automobiles. The US consumes a quarter of all oil,and generates a similar proportion of greenhouse gas emissions.
The majority of oil comes from the Middle East,which has half of known reserves. But other significant sources include Russia,North America,Norway,Venezuela and the North Sea. Alaska's Arctic National Wildlife Refuge could be a major new US source,to reduce reliance on foreign imports.
Most experts predict we will exhaust easily accessible reserves within 50 years,though opinions and estimates vary. We could fast reach an energy crisis in the next few decades, when demand exceeds supply. As conventional reserves become more difficult to access,oth-ers such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.
Since we started using fossil fuels,we have released 400 billion tonnes of carbon,and burning the entire reserves could eventually raise world temperatures by 13℃ .Among other horrors,this would result in the destruction of all rainforests and the melting of all
Arctic ice.
What do experts say about the earth's fuel reserves?
A: The earth's fuel reserves will be accessible for the next 50 years.
B: There will soon be an energy crisis.
C: Conventional reserves will soon become inaccessible.
D: Fuel demand will decline.
共用题干
The Forbidden Apple
New York used to be the city that never sleeps. These days it's the city that never smokes,drinks or does anything naughty(at least,not in public).The Big Apple is quickly turning into the Forbidden Apple.
If you wanted a glass of wine with your picnic in Central Park,could you have one?No chance. Drinking alcohol in public isn't allowed. If you decided to feed the birds with the last crumbs（碎屑）of your sandwich, you could be arrested. It's illegal. If you went to a bar for a drink and a cigarette,that would be OK,wouldn't it?Er…no.You can't smoke in public in New York City.
What's going on?Why is the city that used to be so open-minded becoming like this?
The mayor of New York is behind it all. He has brought in a whole lot of new laws to stop citizens from doing what they want,when they want.
The press are shocked. Even the New York police have joined the argument. They re- cently spent$100,000 ona“Don't blame the cop”campaign. One New York police officer said,”We raise money for the city by giving people fines for breaking some very stupid laws. It's all about money.”
The result is lot of fines for minor offences. Yoav Kashida,and Israeli tourist,fell asleep on the subway. When he woke up,two police officers fined him because he had fallen asleep on two seats(you mustn't use two seats in the subway).Elle and Serge Schroitman were fined for blocking a driveway with their car. It was their own driveway.
The angry editor of Vanity Fair magazine,Graydon Carter,says.”Under New York City law it is acceptable to keep a gun in your place of work,but not an empty ashtray.”He should know. The police came to his office and took away his ashtray（烟灰缸）.
But not all of New York's inhabitants are complaining. Marcia Dugarry,72,said,”The city has changed for the better. If more cities had these laws,America would be a better place to live.”Nixon Patotkis,38,a barman,said,”I like the new laws. If people smoked in here, we'd go home smelling of cigarettes.”
Recent figures show that New York now has fewer crimes per 100,000 people than 193 other US cities.And it's true一It's safer,cleaner and more healthy than before. But let'sbe honest一who goes to New York for its clean streets?
The businessman like the new laws.
A: Right
B: Wrong
C: Not mentioned
The Forbidden Apple
New York used to be the city that never sleeps. These days it's the city that never smokes,drinks or does anything naughty(at least,not in public).The Big Apple is quickly turning into the Forbidden Apple.
If you wanted a glass of wine with your picnic in Central Park,could you have one?No chance. Drinking alcohol in public isn't allowed. If you decided to feed the birds with the last crumbs（碎屑）of your sandwich, you could be arrested. It's illegal. If you went to a bar for a drink and a cigarette,that would be OK,wouldn't it?Er…no.You can't smoke in public in New York City.
What's going on?Why is the city that used to be so open-minded becoming like this?
The mayor of New York is behind it all. He has brought in a whole lot of new laws to stop citizens from doing what they want,when they want.
The press are shocked. Even the New York police have joined the argument. They re- cently spent$100,000 ona“Don't blame the cop”campaign. One New York police officer said,”We raise money for the city by giving people fines for breaking some very stupid laws. It's all about money.”
The result is lot of fines for minor offences. Yoav Kashida,and Israeli tourist,fell asleep on the subway. When he woke up,two police officers fined him because he had fallen asleep on two seats(you mustn't use two seats in the subway).Elle and Serge Schroitman were fined for blocking a driveway with their car. It was their own driveway.
The angry editor of Vanity Fair magazine,Graydon Carter,says.”Under New York City law it is acceptable to keep a gun in your place of work,but not an empty ashtray.”He should know. The police came to his office and took away his ashtray（烟灰缸）.
But not all of New York's inhabitants are complaining. Marcia Dugarry,72,said,”The city has changed for the better. If more cities had these laws,America would be a better place to live.”Nixon Patotkis,38,a barman,said,”I like the new laws. If people smoked in here, we'd go home smelling of cigarettes.”
Recent figures show that New York now has fewer crimes per 100,000 people than 193 other US cities.And it's true一It's safer,cleaner and more healthy than before. But let'sbe honest一who goes to New York for its clean streets?
The businessman like the new laws.
A: Right
B: Wrong
C: Not mentioned
共用题干
Female Bullfighting
It was a unique,eye-catching sight:an attractive woman in a shiny bullfighter's suit,
sword in hand,facing the sharp horns of a black,500-kilogram beast.
Most people thought the days of female bullfighting were over in Spain._____(1)
The first woman fighter,Cristina Sanchez,quit in 1999 because of male discrimination
（歧视）.But Vega is determined to break into what could be Spain's most resistant male
field._____(2)
Spanish women have conquered almost all male professions.______(3) "The
bull does not ask for your identity card,"she said in an interview a few years ago.She
insisted that she be judged for her skills rather than her femaleness.
Vega became a matador（斗牛士）in 1 997 in the southwestern city of Caceres.
_____(4)She entered a bullfighting school in Malaga at age nine and performed her
first major bullfight at age 14 .She has faced as much opposition as Sanchez did.And the
"difficulties have made her grow into a very strong bullfighter,"her brother Jorge says.
The 1 .68-metre tall and somewhat shy Vega says her love of bullfighting does not make
her any less of a woman._____(5)
__________（1）
A:.She intends to become even better than Sanchez was.
B:.Her father was an aspiring（有雄心壮志的）bullfighter.
C:.But many bullfighting professionals continue to insist that women do not have what it takes to perform the country's"national show".
D:."I'm a woman from head to toe and proud of it,"she once said.
E:.She looks like a male bullfighter.
F:But recently,29-year-old Mani Paz Vega became the second woman in Spanish history to fight against those heavy animals.
Female Bullfighting
It was a unique,eye-catching sight:an attractive woman in a shiny bullfighter's suit,
sword in hand,facing the sharp horns of a black,500-kilogram beast.
Most people thought the days of female bullfighting were over in Spain._____(1)
The first woman fighter,Cristina Sanchez,quit in 1999 because of male discrimination
（歧视）.But Vega is determined to break into what could be Spain's most resistant male
field._____(2)
Spanish women have conquered almost all male professions.______(3) "The
bull does not ask for your identity card,"she said in an interview a few years ago.She
insisted that she be judged for her skills rather than her femaleness.
Vega became a matador（斗牛士）in 1 997 in the southwestern city of Caceres.
_____(4)She entered a bullfighting school in Malaga at age nine and performed her
first major bullfight at age 14 .She has faced as much opposition as Sanchez did.And the
"difficulties have made her grow into a very strong bullfighter,"her brother Jorge says.
The 1 .68-metre tall and somewhat shy Vega says her love of bullfighting does not make
her any less of a woman._____(5)
__________（1）
A:.She intends to become even better than Sanchez was.
B:.Her father was an aspiring（有雄心壮志的）bullfighter.
C:.But many bullfighting professionals continue to insist that women do not have what it takes to perform the country's"national show".
D:."I'm a woman from head to toe and proud of it,"she once said.
E:.She looks like a male bullfighter.
F:But recently,29-year-old Mani Paz Vega became the second woman in Spanish history to fight against those heavy animals.
Flash plants produce hot water through _____.
A.the energy to turn a turbine
B.impermeable rock
C.one or two separators
D.turbine operator
E.little or no water
F.hot springs
A.the energy to turn a turbine
B.impermeable rock
C.one or two separators
D.turbine operator
E.little or no water
F.hot springs
共用题干
The Weight Experiment
Nicola Walters has been taking part in experiments in Scotland to discover why humans gain and lose weight. Being locked in a small room called a“ calorimeter”（热量测量室）is one way to find out.
1 .The signs above the two rooms read simply“Chamber One”and“Chamber Two”.These are the calorimeters:4m by 2m white-walled rooms where human volunteers are locked up in the name of science .Outside these rooms another sign reads“Please do not enter work in progress” and in front of the rooms advanced machinery registers every move the volunteers make.Each day,meals measured to the last gram are passed through a hole in the wall of the calorimeter to the resident volunteer.
2 .Nicola Walters is one of twenty volunteers who,over the past eight months,have spent varying periods inside the calorimeter. Tall and slim,Nicola does not have a weight problem,but thought the strict diet might help with her training and fitness programme.As a self-employed community dance rorker,she was able to fit the experiment in around her work.She saw an advert for volun- teers at her local gym and as she is interested in the whole area of diet and exercise,she thought she would help out.
3. The experiment on Nicola involved her spending one day on a fixed diet at home and the next in the room.This sequence was repeated four times over six weeks.She arrived at the calorimeter at8:30 am on each of the four mornings and from then on everything she ate or drank was carefull) measured .Her every move was noted too,her daily exercise routine,timed to the last second. At regular intervals,after eating,she filled in forms about how hungry she felt and samples were taken for analysis.
4 .The scientists help volunteers impose a kind of order on the long days they face in the room. “The first time,I only took one video and a book,but it was OK because I watched TV the rest of the time,”says Nicola. And twice a day she used the exercise bike. She pedaled（踩踏板） for half an hour,watched by researchers to make sure she didn't go too fast.
5 .It seems that some foods encourage you to eat more,while others satisfy you quickly.Volunteers are already showing that high-fat diets are less likely to make you feel full.Believing that they may now know what encourages people to overeat,the researchers are about to start testing a high-protein weight-loss diet. Volunteers are required and Nicola has signed up for further sessions.
Volunteers have to get prepared for the time in the calorimeter_________.
A: the volunteers do
B:.because she does not have a weight problem
C: because the life there can be very boring
D: make people overeat
E: because she was her own boss
F: after passing a high-protein test
The Weight Experiment
Nicola Walters has been taking part in experiments in Scotland to discover why humans gain and lose weight. Being locked in a small room called a“ calorimeter”（热量测量室）is one way to find out.
1 .The signs above the two rooms read simply“Chamber One”and“Chamber Two”.These are the calorimeters:4m by 2m white-walled rooms where human volunteers are locked up in the name of science .Outside these rooms another sign reads“Please do not enter work in progress” and in front of the rooms advanced machinery registers every move the volunteers make.Each day,meals measured to the last gram are passed through a hole in the wall of the calorimeter to the resident volunteer.
2 .Nicola Walters is one of twenty volunteers who,over the past eight months,have spent varying periods inside the calorimeter. Tall and slim,Nicola does not have a weight problem,but thought the strict diet might help with her training and fitness programme.As a self-employed community dance rorker,she was able to fit the experiment in around her work.She saw an advert for volun- teers at her local gym and as she is interested in the whole area of diet and exercise,she thought she would help out.
3. The experiment on Nicola involved her spending one day on a fixed diet at home and the next in the room.This sequence was repeated four times over six weeks.She arrived at the calorimeter at8:30 am on each of the four mornings and from then on everything she ate or drank was carefull) measured .Her every move was noted too,her daily exercise routine,timed to the last second. At regular intervals,after eating,she filled in forms about how hungry she felt and samples were taken for analysis.
4 .The scientists help volunteers impose a kind of order on the long days they face in the room. “The first time,I only took one video and a book,but it was OK because I watched TV the rest of the time,”says Nicola. And twice a day she used the exercise bike. She pedaled（踩踏板） for half an hour,watched by researchers to make sure she didn't go too fast.
5 .It seems that some foods encourage you to eat more,while others satisfy you quickly.Volunteers are already showing that high-fat diets are less likely to make you feel full.Believing that they may now know what encourages people to overeat,the researchers are about to start testing a high-protein weight-loss diet. Volunteers are required and Nicola has signed up for further sessions.
Volunteers have to get prepared for the time in the calorimeter_________.
A: the volunteers do
B:.because she does not have a weight problem
C: because the life there can be very boring
D: make people overeat
E: because she was her own boss
F: after passing a high-protein test