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共用题干
Giant Structures
It is an impossible task to select the most amazing wonders of the modern world since every year more______(1)constructions appear. Here are three giant structures which are worthy of our admiration______(2)they may have been surpassed by some more recent wonders.
The Petronas Twin Towers
The Petronas Towers were the tallest buildings in the world when they were completed in 1999.______(3)a height of 452 metres,the tall twin towers,like two thin pencils,dominate the city of Kuala Lumpur. At the 41st floor,the towers are______(4)by a bridge,symbolizing a gateway to the city. The American architect Cesar Pelli designed the skyscrapers.
Constructed of high-strength concrete,the building______(5)around 1,800 square metres of office space on every floor. And it has a shopping centre and a concert hall at the base.Other______(6)of this impressive building include double-decker lifts,and glass and steel sunshades.
The Millau Bridge
The Millau Bridge was opened in 2004 in the Tarn Valley,in southern France. At the ______(7)it was built,it was the world,5 highest bridge,______(8)over 340m at the highest point. The bridge is described as one of the most amazingly beautiful bridges in the world. It was built to ________ (9) Millau's congestion(拥堵)problems. The congestion was then caused by traffic passing from Paris to Barcelona in Spain. The bridge was built to with-stand the______(10) extreme seismic(地震的)and climatic conditions. Besides , it is guar- anteed for 120 years!
The Itaipu Dam
The Itaipu hydroelectric power plant is one of the largest constructions of its kind in the world.
It______(11)of a series of dams across the River Parana,______(12)forms a natural border between Brazil and Paraguay. Started in 1975 and taking 16 years to complete, the construction was carried out as a joint project between the two______(13).The dam is well-known for both its electricity output and its size. In 1995 it produced 78% of Paraguay's and 25% Of Brazil's______(14)needs. In its construction,the amount of iron and steel used was equivalent to over 300 Eiffel Towers.It is a______(15)amazing wonder of engineering.
10._________
A: much
B: more
C: less
D: most
共用题干
Every Dog Has His Say
Kimiko Fukuda always wondered what her dog was trying to say.Whenever she put on make-up,it would pull at her sleeve.______(46)When the dog barks,she glances at a small elec-tronic gadget(装置).The following" human" translation appears on its screen; "Please take me with you.""I realized that's how he was feeling."says Fukuda.
The gadget is called Bowlingual,and it translates dog barks into feelings.People laughed when the Japanese toymaker Takara Company made the world's first dog-human translation ma-chine in 2002 .But 300,000 Japanese dog owners bought it.______(47)
"Nobody else had thought about it."said Masahiko Kajita,who works for Takara."We spend so much time training dogs to understand our orders;what would it be like if we could understand dogs?"
Bowlingual has two parts.______(48)The translation is done in the gadget using a data-base containing every kind of bark.
Based on animal behavior research,these noises are divided into six categories:happiness, sadness,frustration,anger,declaration and desire.______(49)In this way,the database scien-tifically matches a bark to an emotion,which is then translated into one of 200 phrases.
When a visitor went to Fukuda's house recently,the dog barked a loud"wow wow".______(50)It was followed by"I'm stronger than you"as the dog growled and sniffed(嗅)at the visitor. The product will be available in US pet stores this summer for about US$120.It can store up to 100 barks,even recording the dog's emotions when the owner is away.
______(46)
A: A wireless microphone is attached to the dog's collar,which sends information to the gadget held by the owner.
B: Nobody really knows how a dog feels.
C: This translated as"Don't come this way".
D: More customers are expected when the English version is launched this summer.
E: Now,the Japanese girl thinks she knows.
F: Each one of these emotions is then linked to a phrase like"Let's play","Look at me",or "Spend more time with me".
共用题干
Will We Take Vacation in Spaces?
When Mike Kelly first set out to build his own private space-ferry service,he figured his bread-and-butter business would be lofting satellites into high-Earth orbit. Now he thinks he may have figured wrong.“People were always asking me when they could go,”says Kelly,who runs
Kelly Space TechnologT out of San Bernardino,Californi a.“I realized that real market is in space tourism.”
According to preliminary market surveys,there are 10,000 would-be-space-tourists willing to spend $1 million each to visit the final frontier. Space Adventure in Arlington,Virginia,has taken more than 1 30 deposits for a two-hour,$98,000 space tour tentatively(and somewhat dubiously)set to occur by 2005 .Gene Meyers of the Space Island Group says:“Space is the next exotic vacation spot.”
This may all sound great,but there are a few hurdles.Putting a simple satellite into orbit with no oxygen,life support or return trip necessary already costs an astronomical $22,000/kg.
And that doesn't include the cost of insuring rich and possibly litigious passenger. John Pike of the
Federation of American Scientists acerbically suggests that the entire group of entrepreneurs trying to corner the space tourism market have between them“just enough money to blow up one rocket.”The U .S.space agency has plenty of money but zero interest in making space less expensive for the little guys.So the little guys are racing to do what the government has failed to do:design a reusable launch system that's inexpensive,safe and reliable.Kelly Space's prototype looks like a plane that has sprouted rocket engines.Rotary Rocket in Redwood City,California,hasa booster with rotors make a helicopter-style return to Earth;Kistler Aerospace in Kirkland,Wash- ington,is piecing together its versions from old Soviet engines,shuttle-style thermal protection tiles and an elaborate parachute system.The first passenger countdowns are still years away,but bureaucrats at the Federal Aviation Administration in Washington are already informally discussing flight regulations.After all,you can't be too prepared for a trip to that galaxy far,far away.
For those who are intent on joining the 100-mile high club,Hilton and Budget are plotting to build space hotels.Before the Russian space Mir came down,some people were talking about using it as a low-rent space hotel to reduce the cost. If a space hotel is finally built in space,and if you're thinking of staying in it,you may want to check the Michelin ratings before booking yourself a suite.
Mike Kelly planned to turn his business of making bread and butter into a business that is engaged in space tourism.
A: Right
B: Wrong
C: Not mentioned
共用题干
Eastern Quakes Can Trigger Big Shakes
In the first week of November 2011,people in central Oklahoma experienced more than two dozen earthquakes. The largest,a magnitude 5 .6 quake,shook thousands of fans in a college football stadium,caused cracks in a few buildings and rattled the nerves of many people who had never felt a quake before. Oklahoma is not an area of the country famous for its quakes. If you watch the news on TV,you see reports about all sorts of natural disasters一 hurricanes,tornadoes,flooding and wildfires,to name a few. But the most dangerous type of natural disaster,and also the most unpredictable,is the earthquake.
Researchers at the U. S. Geological Survey estimate that several million earthquakes rattie the globe each year. That may sound scary,but people don't feel many of the tremors because they happen in remote and unpopulated regions.Many quakes happen under the ocean, and others have a very small magnitude,or shaking intensity.
A magnitude 5.8 earthquake that struck central Virginia the afternoon of August 23, 2011,was felt from central Georgia to southeastern Canada. In many urban areas,including Washington,D.C.,and New York City(Wall Street shown),people crowded the streets while engineers inspected buildings.
Scientists know about small,remote quakes only because of very sensitive electronic devices called seismometers.These devices detect and measure the size of ground vibrations
produced by earthquakes.Altogether,USGS researchers use seismometers to identify and locate about 20,000 earthquakes each year.
Although earthquakes can happen anywhere in the world,really big quakes occur only in certain areas. The largest ones register a magnitude 8 or higher and happen,on average,only once each year. Such big ones typically occur along the edges of Earth's tectonic plates.
Tectonic plates are huge pieces of Earth's crust,sometimes many kilometers thick. These plates cover our planet's surface like a jigsaw puzzle. Often,jagged edges of these plates temporarily lock together. When plates jostle and scrape past each other,earthquakes occur. On average,tectonic plates move very slowly一about the same speed as your fingernails grow.
But sometimes earthquakes rumble through portions of the landscape far from a plate's edges. Although less expected,these”mid-plate” tremors can do substantial damage. Some of the biggest known examples rattled the eastern half of the United States two centuries ago. Today,scientists are still puzzling over why the quakes occurred and when similar ones might occur.
Seismometers can identify and locate most of the earthquakes in China.
A: Right
B: Wrong
C: Not mentioned
共用题干
A Health Profile
A health profile is a portrait of all of the factors that influence your health.To draw your health profile, you will______(51)what diseases run in your family,what health hazards you may be exposed to ______(52)work,how your daily______(53)compares to the recommended standards,how much time per week you______(54)exercising and what type of exercise you engage______(55),how stressful your work and family environments are,what kinds of illnesses you get regularly,and______(56) or not you have any one of a number of addictions.______(57)this portrait,you should have a checkup to determine how your blood,heart,and lungs are functioning.This checkup will serve______(58)a baseline,to which you can then compare later tests.
______(59)this profile is thoroughly drawn,you can begin to think about setting health priorities based______(60)your particular portrait.For example,if you drink two martinis every evening,have a high-stress______(61),are overweight,smoke a pack of cigarettes a day,and use marijuana occasional-ly on weekends,you should quit smoking first,followed______(62)losing the excess weight,reducing the stress of your job,giving up your marijuana habit,and then finally giving some______(63)to those martinis if you want to prevent first cancer,and then heart disease.Even for the youthful working person who has never been sick a day in his life,who is______(64)excellent health,agood look at allhealth habits and at work and home environments may suggest.changes that will______(65)him in the future.
59._________
A:Unless
B:Once
C:If
D:Although
共用题干
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.
Snake robots could move in only four directions.
A: Right
B: Wrong
C: Not mentioned
共用题干
第一篇
Approaches to Understanding Intelligences
It pays to be smart,but we are not all smart in the same way.You may be a talented musician,but you might not be a good reader.Each of us is different.
Psychologists disagree about what is intelligence and what are talents or personal abilities.Psychologists have two different views on intelligence.Some believe there is one general intelligence.Others believe there are many different intelligences.
Some psychologists say there is one type of intelligence that can be measured with IQ tests.These psychologists support their view with research that concludes that people who do well on one kind of test for mental ability do well on other tests.They do well on tests using words,numbers,or pictures.They do well on individual or group tests,and written or oral tests.Those who do poorly on one test,do the same on all tests.
Studies of the brain show that there is a biological basis for general intelligence.The brains of intelligent people use less energy during problem solving.The brain waves of people with higher intelligence show a quicker reaction.Some researchers conclude that differences in intelligence result from differences in the speed and effectiveness of information processing by the brain.
Howard Gardner,a psychologist at the Harvard School of Education,has four children.He believes that all children are different and shouldn't be tested by one intelligence test.Although Gardner believes general intelligence exists,he doesn't think it tells much about.the talents of a person outside of formal schooling.He thinks that the human mind has different intelligences.These intelligences allow us to solve the kinds of problems we are presented with in life.Each of us has different abilities within these intelligences.Gardner believes that the purpose of school should be to encourage development of all of our intelligences.
Gardner says that his theory is based on biology.For example,when one part of the brain is injured,other parts of the brain still work.People who cannot talk because of brain damage can still sing.So,there is not just one intelligence to lose.Gardner has identified 8 different kinds of intelligence:linguistic,mathematical,spatial, musical , interpersonal,intrapersonal , body-kinesthetic(身体动觉的),and naturalistic.
According to Gardner,schools should______.
A:test students'IQs
B:train students who do poorly on tests
C:focus on、finding the most intelligent students
D:promote development of all intelligences
共用题干
The Benefits of Lifelong Learning for Adults
Lifelong learning is the process of keeping your mind and body engaged一at any age一by actively pursuing knowledge and experience.In fact,it has many benefits.Firstly,it keeps the mind sharp and it improves the memory.Secondly,it improves self-confidence and offers an opportunity to try something new. Thirdly,it gives the learner the feeling of accomplishment. Also,it offers the learner the opportunity to keep in touch with people who share with him/her the same interests and make new acquaintances.Finally,it offers an opportunity to learn a new skill or trade.
Achieving retirement means having a lot of spare time and becoming more stressed and bored. However,some adults think that learning at that age is a way to get rid of this situation of boredom and stress.For them learning should be a lifelong process and even retirement should be an opportunity to try new things rather than being passive and pessimistic.
Lifelong learning helps you remember things better.
A:Right
B:Wrong
C:Not mentioned
The doctor may recommend limiting the amount of fat in your diet.
A:order
B:insist
C:suggest
D:demand
共用题干
The Roadrunner
The roadrunner(走雀)lives in the desert zone of the southwestern United States and
northern Mexico._________(1)People gave it its name because they usually see it
running across a road,but of course,it spends more time among the plants of the desert
than it does on roads.
The roadrunner is quite a large bird-about 45 centimeters long and 25 centimeters high.
______(2)It holds its head straight out in front and its tail sticks straight out in back.
It takes long steps and can run 30 kilometers an hour.
It eats an amazing variety of food.Although it eats plants once in a while,it is mostly a
meat eater.Most of its diet is insects,but it also catches birds,mice,and other small
animals.It is even brave enough to catch snakes and black widow spiders(蜘蛛).
_________(3)When he finds one,he gives her presents a snake to eat or a tiny
branch of a tree to use in building a nest.Then they build their nest,the female lays eggs,
and they raise their young.
_________(4)One couple in Arizona feeds a pair of roadrunners that come once at
a time every day and make a noise outside the window.If someone doesn't give the bird a
piece of hamburger immediately,the bird knocks on the window with its beak(喙).
Roadrunners are not shy.
__________(5)They will stand on a chair or table and watch television,and they
seem really interested in what is happening on the program.
__________(4)
A: Roadrunners can also become friendly with people.
B: People laugh when it runs because it looks so funny.
C: Itisabird,but it can only fly about as much as a chicken can.
D:In early spring,the bird doesn't eat anything.
E: Another couple feeds a pair of roadrunners that go right into the house.
F: In the spring,a male roadrunner begins looking for a female as a mate.
In the situation comedy,a traditional format for television shows,the same characters appear repeatedly in humorous episodes.
A: respectively
B: again and again
C: simultaneously
D: briefly
共用题干
Ecosystem
1. The word “ecosystem” is short for ecological(生态的)system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms(生物)such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!
2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation(同居)between living and non-living things in a monitored environment,such as a zoo or garden.
3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms(微生物)and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.
4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species(物种),we all play a role in maintaining the ecosystem.
5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat(栖息地)of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement(搬迁): imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.
Plants are essential in an ecosystem because to other living creatures they are______.
A: our share of resources
B: a biological creature
C: a given area
D: the maintenance of the ecosystem
E: the source of food
F: various species
共用题干
Please Fasten Your Seatbelts
Severe turbulence(湍流)can kill aircraft passengers. Now,in test flights over the Rocky
Mountains , NASA(美国航空航天局)engineers have successfully detected clear-air turbulence up to 10 seconds before an aircraft hits it.
Clear-air turbulence often catches pilots by surprise.Invisible to radar,it is difficult to forecast and can hurl(用力抛出去)passengers about the cabin. In December 1 997 , one passenger died and a hundred others were injured when unexpected rough air caused a United Airlines flight over the Pacific to drop 300 meters in a few seconds.
However,passengers can avoid serious injury by fastening their seatbelts.“It is the only antidote(对策)for this sort of thing,”says Rod Bogue,project manager at NASA's Dryden Flight
Research Center in Edwards,California.
The centre's new turbulence detector is based on lidar,or laser radar. Laser pulses are sent ahead of the plane and these are then reflected back by particles in the air. The technique depends on the Doppler effect.The wavelength of the light shifts according to the speed at which the particles are approaching. In calm air,the speed equals the plane's airspeed.But as the particles swirl(打漩)in rough air,their speed of approach increases or decreases rapidly .The rate of change in speed corresponds to the severity(激烈程度)of the turbulence.
In a series of tests that began last month,a research jet flew repeatedly into disturbed air over the mountain ridges(山脉)near Pueblo , Colorado. The lidar detector spotted turbulence between 3 and 8 kilometers ahead,and its forecasts of strength and duration corresponded closely with the turbulence that the plane encountered.
Bogue says that he had“a comfortable amount of time”to fasten his seatbelt. The researchers are planning to improve the lidar's range with a more powerful beam.The system could be installed on commercial aircraft in the next few years.
The last paragraph tells us,among other things,that_______.
A: the lidar detector needs improvement
B: many airlines are interested in the system
C: passengers often forget to fasten their seatbelts
D: the lidar detector can be used in a wide range of areas
What are my chances of promotion if I stay here?
A:retirement
B:advertisement
C:replacement
D:advancement
共用题干
第二篇
Late-night Drinking
Coffee lovers,be careful.Having a quick "pick-me-up" cup of coffee late in the day will interrupt your
sleep. As well as being a stimulant(兴奋剂),caffeine interrupts the flow of melatonin(褪黑激素),the
brain hormone that sends people into a sleep.
Melatonin levels normally start to rise about two hours before bedtime.Levels then peak between 2 am
and 4 am , before falling again. " It 's the neurohormone(神经激素)that controls our sleep and tells our
body when to sleep and when to wake,"says Maurice Ohayon of the Stanford Sleep Epidemiology Research
Center at Stanford University in California. But researchers in Israel have found that caffeinated coffee halves
the body'S levels of this sleep hormone.
Lotan Shilo and a team at the Sapir Medical center in Tel Aviv University found that six volunteers slept
less well after a cup of caffeinated coffee than after drinking the same amount of decaf(脱咖啡因咖啡).On
average,subjects slept 336 minutes per night after drinking caffeinated coffee,compared with 415 minutes
after decaf. They also took half an hour to drop off,twice as long as usual.
In the second phase of the experiment,the researchers woke the volunteers every three hours and asked
them to give a urine(尿)sample.Shilo measured concentrations of a breakdown product of melatonin.The
results suggest that melatonin concentrations in caffeine drinkers were half those in decaf drinkers.In a paper
accepted for publication in Sleep Medicine,the researchers suggest that caffeine blocks production of the
enzyme(酶)that drives melatonin production.
Because it can take many hours to eliminate caffeine from the body.Ohayon recommends that coffee
lovers switch to decaf after lunch.
The author mentions "pick-me-up" to indicate that_______.
A:melatonin levels need to be raised
B:coffee is a stimulan
C:neurohormone can wake us up
D:caffeine can balance our brain hormone
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