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A company in Phoenix,Arizona,says that it can now clone your cat."Actually,"said Felix Lee,President of Twice Is Nice,Inc.,"you don't even have to wait until your beloved cat dies. (46)______."
The price is steep.A clone of your cat will cost $50,000.First,(47)______.This is sent to TwIN,Inc.,where it is cultured to grow fresh new cells.These new cells are stored in liquid nitrogen until you notify TwIN,Inc.,that you are ready for the clone.(48)______.A cultured cell is implanted into a female cat that is in estrus,and(49)______,a kitten is born about 60 days later. The new kitten is weaned in about eight weeks.TwIN,Inc.delivers the kitten to you after it receives the remaining $25,000.
"We are a growing company,"said Lee."Our facility can handle about a dozen births a year now,but our goal is to produce about 50 kittens and 50 puppies a year."The company is currently experimenting with stray dogs.Some canine clones seem to be perfect,but some have been bizarre. Nevertheless,(50)______.
_________(50)
A:At this time,you pay half the amount($25,000)
B:if all goes well
C:We already have clients whose clone lives with its donor
D:your veterinarian must do a biopsy of your cat
E:Many pet owners have benefited from cloning technology
F: Lee believes that they will be successfully cloning dogs in about a year
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The Cold Places
The Arctic is a polar region.It surrounds the North Pole.
Like Antarctica,the Arctic is a land of ice and snow.Antarctica holds the record for a low temperature reading-125 degrees
Fahrenheit below zero. Reading of 85 degrees below zero is common in both the Arctic and Antarctica.Winter temperatures average 30 degrees below zero in the Arctic .At the South Pole the winter average is about 73 degrees below zero.
One thing alone makes it almost impossible for men to live in Antarctica and in parts of the Arctic .This one thing is the low temperature-the killing chill of far North and the polar South.
To survive,men must wear the warmest possible clothing. They must build windproof shelters .They must keep heaters going at all times.Not ever for a moment can they be unprotected against the below-zero temperatures.
Men have a way of providing for themselves.Polar explorers wrap themselves in warm coats and furs .The cold makes life difficult. But the explorers can stay alive.
What about animals?Can they survive?Do we find plants?Do we find life in the Arctic and in Antarctica?Yes,we do. There is life in the oceans.There is life on land.
Antarctica,as we have seen,is a cold place indeed.But this has not always been the case.
Expedition scientists have discovered that Antarctica has not always been a frozen continent. At one time the weather in Antarctica may have much like our own.
Explorers have discovered coal in Antarctica. This leads them to believe that Antarctica at one time was a land of swamps and forests.Heat and moisture must have kept the trees in the forests alive.
At one time,the weather in Antarctica was so warm and damp that trees grew there.
A: Right
B: Wrong
C: Not mentioned
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Cell Phone Lets Your Secret Out
Your cell phone holds secrets about you.Besides the names and _____________(51)that you've pro-
grammed into it,traces of your DNA linger on the device,according to a new study.
DNA is genetic material that______________(52)in every cell.Like your fingerprint,your DNA is unique
to you一 _____________(53)you have an identical twin.Scientists today routinely analyze DNA in blood,
saliva,or hair left _____________(54)at the scene of a crime.The results often help detectives identify
_____________(55)and their victims.Your cell phone can reveal more about you _____________(56)you might
think.
Meghan J.McFadden,a scientist at McMaster University in Hamilton,Ontario,heard about a crime in
which the suspect bled onto a cell phone and later dropped the______________(57).This made her wonder
whether traces of DNA lingered on cell phones even when no blood was involved.______________(58)she and
colleague Margaret Wallace of the City University of New York analyzed the flip-open phones of 10 volun-
teers.They used swabs to collect______________(59)traces of the users from two parts of the phone:the
outside,where the user holds it,and the______________(60),which is placed at the user's ear.
The scientists scrubbed the phones using a solution made mostly______________(61)alcohol.The aim of
washing was to remove all detectable traces of DNA.The owners got their phones______________(62)for
another week.Then the researchers collected the phones and repeated the swabbing of each phone once
more.
The scientists discovered DNA that _____________(63)to the phone's speaker on each of the phones.
Better samples were collected from the outside of each phone,but those swabs also picked up DNA that be-
longed to other people who had apparently also handled the phone.______________(64),DNA showed up even
in swabs that were taken immediately after the phones were scrubbed.That suggests that washing won't remove
all traces of evidence from a criminal's device.So cell phones can now be added to the
______________(65)of clues
that can clinch a crime-scene investigation.
_________(52)
A:appeals
B:appoints
C:appears
D:applies
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The police will need to keep a wary eye on this area of town.
A:naked
B:cautious
C: blind
D:private
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He picked a book from the bookshelf and then commenced to read.
A: directed
B: commented
C: committed
D: began
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第二篇
Hack
The first big-name hackers include Steve Wozniak,Bill Gates and Linus Torvalds,all now highly recog-
nizable names behind many of the computer technologies used today. These early hackers had a love of tech-
nology and a compelling need to know how it all worked,and their goal was to push programs beyond what
they were designed to do.Back then,the word"hacker" didn't have the negative connotation it has today.
The original hacker ethic,rooted out of simple curiosity and a need to be challenged,appears to be dead.
The objectives of early hackers are a far cry from the goals of today'S hacker. The motivation of the new
breed of hackers appears not to be curiosity,or a hunger for knowledge,as it used to be.Instead,most of to-
day'S hackers are driven by greed,power,revenge,or some other malicious intent,treating hacking as a game
or sport,employing the tools that are retdily available via the Internet.
The rate of security attacks is actually outpacing the growth of the Internet.This means that something
besides the growth of the Internet is driving the rise in security attacks.Here are some realities you should
know about:Operating systems and applications will never be secure.New vulnerabilities will be introduced
into your environment every day.And even if you ever do get one operating system secure,there will be new
operating systems with new vulnerabilities一phones,wireless devices,and network appliances.Employees will
never keep up with security polices and awareness.It doesn't matter how much you train and educate your
employees.If your employees disregard warnings about the hazards of opening questionable e-mail attach-
ments,how are you going to educate them about properly configuring firewalls and intrusion detection systems
for their PCs?Managers have more responsibility than ever. And on top of the realities listed above,security
managers are being asked to support increasing degrees of network availability and access.There are some
good security measures you can take:Employ a layer 7,full-inspection firewall.Automatically update your
anti-virus at the gateway,server and client. Keep all of your systems and applications updated.Hackers com-
monly break into a website through known security holes,so make sure your servers and applications are
patched and up to date.Turn off unnecessary network services.Eliminate all unneeded programs.Scan net-
work for common backdoor services一use intrusion detection systems,vulnerability scans,anti-virus protection.
Which of the following is NOT true of security attacks?
A:Employees will keep up with security polices and awareness if they are highly-trained.
B:The rate of security attacks appears faster than the growth of the Internet.
C:One's computer system will never be secure.
D:Vulnerabilities can go through phones,wireless devices,and network appliances.
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Free Statins With Fast Food Could Neutralize Heart Risk
Fast food outlets could provide statin drugs free of______(51)so that customers can re-duce the heart disease dangers of fatty food,researchers at Imperial College London______(52)in a new study.
Statins reduce the______(53)of unhealthy"LDL"cholesterol in the blood.A wealth of trial data has proven them to be highly effective at______(54)a person's heart attack risk.
In a paper published in the American Journal of Cardiology,Dr. Darrel Francis and col-leagues calculate that the reduction in heart attack risk offered by a statin is______(55)to off-set the increase in heart attack risk from______(56)a cheeseburger and drinking a milk-shake.
Dr. Francis,from the National Heart and Lung Institute at Imperial College London,who is the senior author of the study,said,"Statins don't cut out all of the______(57)effects of che-eseburgers and French fries .It's better to avoid fatty food altogether. But we've worked out that in terms of your______(58)of having a heart attack,taking a statin can reduce your risk to more or less the same______(59)as a fast food meal increases it."
"It's ironic that people are free to take as many unhealthy condiments in fast food outlets as they______(60),but statins,which are beneficial to heart health,have to be prescribed.It______(61)sense to make risk-reducing stains available just as easily as the unhealthy condi-ments that are provided free of charge .It would cost less than 5 pence per______(62)-not much different to a sachet of sugar,"Dr. Francis said.
When people engage in risky behaviours like driving or smoking,they're encouraged to take______(63)that lower their risk,like______(64)a seatbelt or choosing cigarettes with flu-ters .Taking a statin is a rational way of______(65)some of the risks of eating a fatty meal.
53._________
A: number
B: amount
C: volume
D: product
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Working for Fun and Profit
1.It's a sunny weekend morning. You decide to take a walk.Everything is quite except for a.group of people and some colorful objects you see about three blocks away.As you get closer,you notice that there are many things lying on the ground:some National Geographic magazines,a collection of toy trucks,some weight lifting equipment,two bicycles,and a set of chairs.People are parking cars,getting out,and looking over the objects in the driveway.You consider taking a detour around the group of people,but you are curious.Was there an accident?Is this a party?No!Welcome to your first garage sale!
2.On the same morning,a friend of yours takes a drive.He makes a mistake at an intersection and takes a wrong turn.He passes a large parking lot full of people,not cars.He sees many multicolored objects.At first he thinks it's an art show. Then he decides it's a fair. He parks his car and gets out to explore.He's just arrived at his first flea market.
3.Garage sales and flea market are popular in the United States.Many Americans find that they can make a little extra money and have fun being"weekend entrepreneurs”.They take outgrown clothing,appliances,toys,and books and resell them at garage sales and flea markets.
4.Flea markets are generally open spaces in or out of town that become busy sales centers on weekends.People who want to sell new or used clothing,tools,furniture,or books rent a space for the day for a small amount of money and sell their merchandise.Shoppers from near and far come to get good buys on imported watches,house plants,magazines,microscopes,children's clothes,and handmade goods such as embroidered pillowcases or jewelry.Some shoppers even buy and sell antiques.They search flea markets for special treasures that they can resell in their own stores for lots of money.
5.Garage sales are smaller than flea markets,and the merchandise consists mainly of household items.Dishes,pots and pans,coat hangers,and children's clothing are inexpensive and common at garage sales. People frequently have garage sales before they move and on weekends when the weather is nice.Sometimes several families gather their unwanted household goods and sell them together. More merchandise attracts more customers.
6.Cleaning,organizing,pricing,and moving merchandise is hard work,but the popularity of flea market and garage sales proves that many Americans work for fun!
People usually have garage sales after they move.
A:Right
B:Wrong
C:Not mentioned
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第三篇
The Balance between Fluency and Accuracy
To be able to speak English with fluency and accuracy is a goal of many Chinese English learners.Fluency can be simply defined as"being able to communicate ideas without having to stop and think too much about what one is saying";speaking accurately means"speaking without errors of grammar and vocabulary".
However,the fact is that many students find that the faster they try to speak,the more mistakes they make.And,when they slow down,there may be fewer errors though it can sound unnatural. So,how to balance accuracy and fluency in spoken English?
It can depend on the manner in which one has studied English in the past.People who tend to focus on accuracy may find that they worry too much about making mistakes.This can make them nervous or embarrassed about speaking English in public.As a result,their spoken English might not improve.This means that,although they know English grammar and vocabulary well,they might not be able to hold a good conversation.
On the other hand,there are those who really like to talk and are willing to try their language out even if they make mistakes.This willingness to take risks helps them speak more fluidly.But,if they make a lot of mistakes,it may make it difficult for them to have their ideas understood.
The debate about which is more important一fluency or accuracy一in the English language has lasted for a long time.Still,one thing is clear:neither of them should be absent if one is to speak a language well.How can we be sure that we can develop both?The following tips could help.
Find the problem.What kind of person are you一one who focuses on accuracy or one who focuses on frequency?The first step is to recognize your problem and go to work on it.Think about situations where you've used English and how you felt about making mistakes?Do you always try some new language even though it might not be correct?Or do you feel embarrassed by mistakes?
Focus on one problem at a time.When you speak English,find the mistakes you make most often.One mistake Chinese often make is omitting the"S"from the third person singular verb.Or you may speak too slowly as if you were searching for the right word and correct grammar. The next time you use English,try to work on those problems you have identified.If it's fluency,try to focus on it.If you have a problem with the third person singular,try to concentrate on when you make such errors.Don't spend time thinking about other mistakes.By choosing an area to work on,you can isolate problems and help yourself overcome them.
Vary your practice.If you go to an English corner or an English club,try to change the types of activities you take part in so that you practice both fluency and accuracy.Public speaking allows you to slow down and be sure you have time to concentrate on the language.Meanwhile,discussions are good practice for fluency,especially if you don't stop each time a mistake is made.
Tell the difference between fluency and speed.Some Chinese think that speaking fast is the same as speaking fluently.In fact,speaking fluently involves not only speed.It also involves stress, pronunciation and intonation. If you make a mistake in these,speaking fast will only make it worse. Don't sacrifice understanding for speed.
Record yourself. Take a tape recorder and record a conversation with a friend or a speech or talk to yourself as you do it naturally!A two-or-three-minute recording is enough.When you've finished,listen to yourself. Can you find out any error and correct it?Make it a regular practice.The more you record yourself,the more confident and natural sounding you will become.
Which is more important,accuracy and fluency?
A:Accuracy.
B:Fluency.
C:Both accuracy and fluency.
D:The author didn't give his answer.
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第一篇
A recent study,published in last week's Journal of American Medical Association,offers a picture of how risky it is to get a lift from a teenage driver. Indeed,a 16-year-old driver with three or more passengers is three times as likely to have a fatal accident as a teenager driving alone,by contrast,the risk of death for drivers between 30 and 59 decreases with. each additional passenger.
The author also found that the death rates for teenage drivers increased dramatically after 10 pm,and especially after midnight.With passengers in the car,the driver was even more likely to die in a late-night accident.
Robert Foss,a scientist at the University of North Carolina Highway safety Research Center, says the higher death rates for teenage drivers,have less to do with"really stupid behavior" than with just a lack of driving experience."The basic issue,"he says,"is that adults who are responsible for issuing licenses fail to recognize how complex and skilled a task driving is."
Both he and the author of the study believe that the way to mitigate(使······緩解)the problem is to have states institute so-called graduated licensing systems,in which getting a license is a multistage process.A graduated license requires that a teenager first prove himself capable of driving in the presence of an adult,followed by a period of driving with passenger restrictions,before graduating to full driving privileges.
Graduate licensing systems have reduced teenage driver crashes,according to recent studies. About half of the states now have some sort of graduated licensing system in place,but only 10 of those states have restrictions on passengers. California is the strictest,with a novice(新手)driver prohibited from carrying any passenger under 20(without the presence of an adult over 25)for the first six months.
The present situation in about half of the states is that the graduated licensing system_________.
A:is under discussion
B:is about to be set up
C:has been put into effect
D:has been perfected
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