1 . Could your dog be prone to a fatal disease? Is your new shelter pup part beagle or boxer? Many pet owners seek answers to these questions, and as a result, direct-to-consumer dog DNA testing is booming.
Human interfering with dog DNA has long been the driving factor behind dogs’ breed diversity — or lack thereof. But a dog’s DNA can also be used to confirm their lineage (血统) or identify their breed, a boon for pet owners on the lookout for breed-specific health or behavioral challenges or those looking to confirm their dog really has the heritage claimed by a breeder or seller. During DNA analysis, labs sequence the dog’s DNA and look for similarities with a dataset of identified dog breeds.
But breed identification isn’t as simple as it might seem. In a study published in the Journal of the American Veterinary Medical Association last month, scientists looked into the accuracy of breed prediction in commercially available DNA tests that required a photo of the dog in addition to its DNA sample. The results were mixed, says Casey Greene, a professor who co-authored the study.
“Most tests could accurately distinguish the breed of purebred dogs,” says Greene. But the analysis suggested that some testing companies might rely on the photo more than the dog’s actual genetics — and revealed big differences between companies’ business practices and the genetic datasets they use to determine dog breeds.
The researchers submitted photos and DNA of 12 purebred dogs to a total of six commercial canine (犬的) ancestry identification services. Since each pup was purebred and possessed extensive American Kennel Club paperwork, the researchers knew their breed conclusively—but in some cases they provided a photo of a different dog to see if the photo influenced the DNA results. One of the companies misidentified a purebred Chinese crested dog — almost entirely hairless — as a long-haired Brittany spaniel, seemingly based on the photo alone. The other five did identify the registered breed correctly, but often gave different predictions for other “ancestor” breeds in dogs whose DNA suggested mixed breeding in prior generations. The researchers concluded that veterinarians and pet owners alike should “approach direct-to-consumer tests with caution” given the lack of industry standardization and at least one company’s reliance on photographs instead of DNA analysis.
Despite these concerns, though. dog DNA seems headed for a golden age — and the insights revealed through further study of Fido’s genome (基因组) have already reached far beyond the doghouse. Domesticated dogs have emerged as surprising superstars in medical research that benefits humans. According to researchers, that’s just the beginning. With implications ranging from entertaining to consequential, there’s no telling what dog DNA will continue to unleash.
1. The underlined word “boon” in paragraph two is closest in meaning to ________.A.blessing | B.substitute | C.duty | D.struggle |
A.it assists in accurately determining the breed a dog belongs to |
B.it helps to predict whether dogs are subject to certain diseases |
C.it provides pet owners with insights into dogs’ behavioral challenges |
D.it sequences the DNA of identified dog breeds to find their similarities |
A.Photos play a more significant role in identifying a dog’s breed than its actual genetics. |
B.It is a common phenomenon that the DNA analysis of dogs may yield mixed results. |
C.Commercial dog DNA tests still have limitations and should be dealt with cautiously. |
D.Direct-to-consumer tests overshadow DNA analysis in identifying purebred dogs. |
A.Controversies regarding its reliability are here to stay. |
B.It is bound to make breakthroughs in the fields of medicine and entertainment. |
C.It can step into a golden age as long as some research limitations are fixed. |
D.It may have far-reaching significance and be applied to a wider range of areas. |
2 . The Justice of the Court
The purpose of the American court system is to protect the rights of the people. According to American law, if someone
In order to arrest a person, the police
The next step is for the suspect to go before a judge. The judge decides whether the suspect should be kept in jail or
The suspect returns to court a week or two later. A lawyer from the district lawyer’s office presents a case against the suspect. This is called a(n)
At the trial, a jury of 12 people listens to the evidence from both lawyers and hears the testimony of the witnesses. Then the jury goes into a private room to consider the evidence and decide whether the defendant is guilty of the crime. If the jury decides that the defendant is innocent, he goes free.
The American justice system is very complex and sometimes operates slowly. However, every step is designed to protect the rights of the people. These
A.is guilty of | B.is responsible for | C.is accused of | D.is ashamed of |
A.unpleasant | B.inexperienced | C.paralleled | D.innocent |
A.On the contrary | B.As a result | C.In addition | D.In other words |
A.responsibility | B.convincing | C.humanity | D.initiative |
A.are obliged to | B.might as well | C.are entitled to | D.are qualified to |
A.reasonably | B.formally | C.readily | D.occasionally |
A.locked up | B.set free | C.concerned about | D.cared for |
A.put up | B.put forward | C.put on | D.put through |
A.process | B.decision | C.opportunity | D.hearing |
A.victims | B.claims | C.evidence | D.information |
A.sufficient | B.fantastic | C.demanding | D.economic |
A.call on | B.call at | C.call up | D.call for |
A.Besides | B.However | C.Therefore | D.Consequently |
A.booking | B.sentencing | C.punishing | D.releasing |
A.common | B.substantial | C.individual | D.popular |
3 . Problem-solving
Solving problems draws on two types of intelligence: crystal and fluid. Crystal intelligence involves using stored knowledge to answer questions of fact (e.g. what is the speed of light?), which relies on our ability to learn and remember information.
Fluid intelligence involves solving more creative problems, such as how to get a lion, a goat and a cabbage over a river in a single-passenger boat.
Complex problems, on the other hand, require a different approach, because the number of things you need to know and handle is greater than your consciousness brain can cope with.
The reason is that focusing attention on sequential computation, which is done by the brain’s left side, closes down areas of the right side that are concerned with taking a wider view.
A.A chess move, for example, can lead to billions of outcomes. |
B.Intense attention locks both sides of the brain into a particular pattern of activity. |
C.This kind of intelligence has proven more difficult to understand. |
D.Master players, by contrast, use their right side as well as their left. |
E.As well as looking at problem from multiple angles, brilliant problem-solving involves dismissing bad options quickly. |
F.We tend to work out simple problems—those involving just a few factors—methodically. |
A. adaptable B. capacity C. complicated D. decline E. demand F. evaluating G. highlighted H. impacts I. occurs J. pursuing K. survive |
Economics survive by continually responding to the world around them. This means employing new technologies or exploiting new international markets when
So how can economies
The
Adapt to Survive for the first time brings together the two most comprehensive sources of talent data in the world: the real-time behaviours drawn from LinkedIn’s 277 million members and employer information from PwC’s Saratoga database of people and performance metrics (指标) which covers more than 2,600 employers across the globe. This report sets a new benchmark for
● Individuals — Prove your adaptability.
● Employers — Seek out, nurture and reward talents who can adapt.
● Educators — Offer courses and job training that produce
● Governments — Create a climate of adaptability.
A. applause B. capturing C. devoted D. driven E. essence F. extends G. marking H. pales I. peer J. stage K. stem |
Exploring the Essence of Heroism
Like many of my generation, I have a weakness for hero worship. But as we
Across diverse cultures, heroes exhibit certain traits that attract and motivate others. A hero has a story of adventure to tell and a community offering its
The hero lives a life worthy of imitation. A crucial test for would-be heroes is what or whom do they serve? If the answer or evidence suggests they are
While figures like Madonna and Michael Jackson command fame, their influence
In conclusion, heroes are not just individuals of genius or originality, but they are also embodiments of selflessness and service to a higher purpose. They breathed new life into unchangeable situations,
6 . The prevalence (普遍) of sweatshop (血汗工厂) labor depends largely on the definition being used. At its most
It can be
Another factor that
Certain economists argue against the popular opinion that sweatshop labor should be considered
However, other experts think that
A.accurate | B.general | C.applicable | D.specific |
A.opinion | B.condition | C.image | D.representation |
A.However | B.Moreover | C.Therefore | D.Otherwise |
A.tax | B.criminal | C.civil | D.labor |
A.exclusively | B.particularly | C.broadly | D.initially |
A.meaningless | B.significant | C.awkward | D.difficult |
A.After all | B.As a result | C.Above all | D.As usual |
A.adds to | B.results from | C.puts off | D.appeals to |
A.in spite of | B.in addition to | C.in terms of | D.in return for |
A.comparative | B.competitive | C.complicated | D.potential |
A.By contrast | B.In turn | C.All in all | D.Last but not least |
A.necessary | B.constructive | C.illegal | D.inhuman |
A.encouraged | B.forbidden | C.reminded | D.obliged |
A.establishing | B.enforcing | C.maintaining | D.dropping |
A.possible | B.incredible | C.avoidable | D.necessary |
7 . Residents of urban areas make use of public transportation on their way to school or the office. But when their final
With the last mile problem in mind, the makers of the URB-E
Depending on usage, the URB-E can travel for 32 kilometers on a single
The URB-E is made from aircraft-grade aluminum (铝合金) and comes in two basic models: the URB-E Commuter and URB-E GP. The main
Both models come with accessories (附件)
At this year’s international Consumer Electronic Show (CES)in Las Vegas, tech website The Verge awarded the URB-E with its “Best Personal Transportation” award. Singing the URB-E’s
A.purpose | B.destination | C.transportation | D.vehicle |
A.refer | B.accustom | C.attach | D.stick |
A.discovered | B.introduced | C.designed | D.manufactured |
A.convenient | B.efficient | C.objective | D.similar |
A.constantly | B.eventually | C.mainly | D.practically |
A.charge | B.tourism | C.competition | D.distance |
A.cover | B.develop | C.address | D.conquer |
A.breaks away | B.stands out | C.invests in | D.perseveres in |
A.difference | B.characteristic | C.association | D.advantage |
A.familiar | B.equivalent | C.important | D.opposed |
A.as a result of | B.such as | C.in all | D.in addition to |
A.install | B.explore | C.feature | D.equip |
A.Optional | B.Critical | C.Essential | D.Unique |
A.advances | B.delivery | C.praises | D.prospect |
A.reasonable | B.flexible | C.fascinating | D.available |
A.The advantages of reality TV shows. | B.The disadvantages of reality TV shows |
C.Their experiences in reality TV shows. | D.Their different views on reality TV shows. |
A.Ordinary people. | B.Famous people. |
C.Stupid people. | D.Popular people. |
A.Most of the situations are not real. | B.Some of them are too touching. |
C.They are full of tension and drama. | D.She will never get into such situations. |
A.They are amusing but sometimes harmful. |
B.They are a form of “gossip entertainment” |
C.They can entertain and sometimes educate people. |
D.They can make people know more about nature. |
9 . In Favour of Simple Writing
Do you edit text messages carefully before sending them? If so, you may be the kind of person who takes pride in
People are constantly receiving messages, from the mailbox to the inbox to the text-message alert. What to read, what to skim (略读) and what to ignore are decisions that nearly everyone has to make dozens of times a day. A new book titled All Readers are Busy Nowadays makes the argument for being the careful kind of
Take “less is more”. Most books on writing well advocate the advice to
Keeping messages to a
Syntax (句法) and
If everyone is a busy reader, everyone is a busy writer, too. That may make it tempting to sent as many messages as
A.conveying | B.understanding | C.crafting | D.sending |
A.care | B.quantity | C.simplicity | D.technology |
A.reader | B.poster | C.learner | D.writer |
A.structures | B.principles | C.aims | D.alternatives |
A.remove | B.ignore | C.reconsider | D.interpret |
A.conveyed | B.translated | C.tested | D.shaped |
A.lowered | B.affected | C.doubled | D.maintained |
A.basic | B.positive | C.definite | D.single |
A.Recording | B.Reducing | C.Counting | D.Estimating |
A.in comparison | B.after all | C.for instance | D.in particular |
A.word-choice | B.pattern-design | C.target-setting | D.platform-selection |
A.difficult | B.suitable | C.challenging | D.common |
A.carefully | B.often | C.politely | D.quickly |
A.outcomes | B.points | C.figures | D.benefits |
A.received | B.written | C.read | D.answered |
10 . Today, in most of the theatres in Britain, the stages are situated behind a sort of arch (拱门), called the proscenium (幕布前的舞台部分) arch. The arch runs across the building with the stage on one side of it and the auditorium, housing the audience, on the other. The audience is kept to the area from which it can get a clear view of the stage.
The modern idea of having the stage in front of the proscenium arch is not really modern, of course. It makes our stages much like Shakespeare’s.
Moreover, nowadays, people are finding that modern theatres are built to sit in comfortably for two or three hours at a stretch.
A.Over the last few decades, since the Second World War, theatrical customs have altered. |
B.It makes people feel, as they watch a play or a show, that they are seeing a living and moving picture. |
C.All these innovations have quickened up the pace of the drama. |
D.This is an advantage both for actors and audience. |
E.Today the theatres are much more comfortable because of the many improvements. |
F.Often they can meet and eat in the restaurants attached to the theatres. |