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 . Huge health care bills, long emergency-room waits and the inability to find a primary care physician just scratch the surface of the problems that patients face daily.
Primary care should be the backbone of any health care system. Countries with appropriate primary care resources score highly when it comes to health outcomes and cost. The U.S. takes the opposite approach by emphasizing the specialist rather than the primary care physician.
A recent study analyzed the providers who treat Medicare beneficiaries (老年医保受惠人). The startling finding was that the average Medicare patient saw a total of seven doctors—two primary care physicians and five specialists—in a given year. Contrary to popular belief, the more physicians taking care of you don’t guarantee better care. Actually, increasing fragmentation of care results in a corresponding rise in cost and medical errors.
How did we let primary care slip so far? The key is how doctors are paid. Most physicians are paid whenever they perform a medical service. The more a physician does, regardless of quality or outcome, the better he’s reimbursed (返还费用). Moreover, the amount a physician receives leans heavily toward medical or surgical procedures. A specialist who performs a procedure in a 30-minute visit can be paid three times more than a primary care physician using that same 30 minutes to discuss a patient’s disease. Combining this fact with annual government threats to indiscriminately (任意地) cut reimbursements, physicians are faced with no choice but to increase quantity to boost income.
Primary care physicians who refuse to compromise quality are either driven out of business or to cash-only practices, further contributing to the decline of primary care.
Medical students are not blind to this scenario. They see how heavily the reimbursement deck is stacked against primary care. The recent numbers show that since 1997, newly graduated U. S. medical students who choose primary care as a career have declined by 50%. This trend results I emergency rooms being overwhelmed with patients without regular doctors.
How do we fix this problem?It starts with reforming the physician reimbursement system. Remove the pressure for primary care physicians to squeeze in more patients per hour, and reward them for optimally (最佳的) managing their diseases and practicing evidence-based medicine. Make primary care more attractive to medical students by forgiving students loans for those who choose primary care as a career and reconciling the marked difference between specialist and primary care physician salaries.
We’re at a point where primary care is needed more than ever. Within a few years, the first wave of the 76 million Baby Boomers will become eligible for Medicare. Patients older than 85, who need chronic care most, will rise by 50% this decade.
Who will be there to treat them?
1. We learn from the passage that people tend to believe that ________.A.the more costly the medicine, the more effective the cure |
B.seeing more doctors may result in more diagnostic errors |
C.visiting the same doctor on a regular basis ensures good health |
D.the more doctors a patient sees, the better |
A.increase their income by working overtime |
B.improve their expertise and service |
C.see more patients at the expense of quality |
D.make various deals with specialists |
A.Bridge the salary gap between specialist and primary care physicians. |
B.Extend primary care to patients with chronic diseases. |
C.Recruit more medical students by offering them loans. |
D.Reduce the tuition of students who choose primary care as their major. |
A.The Health Care in Trouble | B.The Imbalance System |
C.The Declining Number of Doctors | D.The Ever-rising Health Care Costs |
4 . More people are travelling than ever before, and lower barriers to entry and falling costs means they are doing so for
The rise of “city breaks” 48-hour bursts of foreign cultures, easier on the pocket and annual leave balance has increased tourist numbers, but not their
In response to this situation, cities have come up with various solutions. For instance, Amsterdam has started advising visitors to seek
But it also proposes a better way, which is called “de-tourism”: sustainable travel tips and
A greater variety of
Font says cities could stand to be more
A.longer | B.shorter | C.wider | D.clearer |
A.environmental | B.national | C.economic | D.geographic |
A.locals | B.tourists | C.visitors | D.cleaners |
A.transports | B.accommodation | C.restaurants | D.service |
A.cause | B.fuel | C.transfer | D.ease |
A.separate | B.individual | C.alternative | D.objective |
A.reform | B.guidance | C.invitation | D.support |
A.convincing | B.discouraging | C.promoting | D.enjoying |
A.release | B.enhance | C.remove | D.relieve |
A.culture | B.knowledge | C.entertainment | D.ability |
A.go with | B.bring up | C.come back | D.lay off |
A.selective | B.optimistic | C.curious | D.doubtful |
A.distinction | B.harmony | C.association | D.comparison |
A.French | B.Japanese | C.Spanish | D.German |
A.comfortable | B.complex | C.temporary | D.sustainable |
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,
7 . 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 |
8 . Sandhya Sriram is impatient. The stem-cell (干细胞) scientist wanted to put her knowledge to use, developing cultivated seafood. Yet no one was doing that in Singapore. So four years ago, she set up a company to create lab-grown crustacean (甲壳纲动物) meat.
Today, the results of her
Shiok Meats has already revealed shrimp, lobster, and crab prototypes (最初形态) to a select group of tasters, and it plans to
But even if that ambitious
“We’re at an interesting stage of a startup; it’s called the Valley of Death,” says Sriram. “We are in the space where we haven’t submitted for regulatory approval yet, but we’re looking to commercialize in the next two years.” Nevertheless, the impatient entrepreneur is
In a word, when science meets seafood, many wonderful things happen naturally.
1.A.Eagerly | B.Hurriedly | C.Incidentally | D.Interestingly |
A.dieter | B.foodie | C.taster | D.vegetarian |
A.discipline | B.enthusiasm | C.discovery | D.mindset |
A.growing | B.investigating | C.increasing | D.targeting |
A.accept | B.adopt | C.grant | D.seek |
A.farm | B.race | C.section | D.line |
A.available | B.affordable | C.competitive | D.profitable |
A.additive | B.cruelty | C.meat | D.salt |
A.guideline | B.transformation | C.condition | D.timeline |
A.demanding | B.directing | C.persuading | D.training |
A.delightful | B.insightful | C.open-minded | D.optimistic |
A.difference | B.emergence | C.sacrifice | D.leap |
A.Tracking | B.Supervising | C.Popularizing | D.Sampling |
A.feeding | B.killing | C.mistreating | D.trapping |
A.captured | B.stranded | C.consumed | D.produced |
9 . 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 |
10 . Maps, number lines, shapes, artwork and other materials tend to cover elementary classroom walls. However, too much of a good thing may end up
Psychology researchers Anna V. Fisher, Karrie E. Godwin and Howard Seltman of Carnegie Mellon University looked at whether classroom displays affected children’s ability to maintain
“Young children spend a lot of time — usually the whole day — in the same classroom, and we have shown that a classroom’s
Should teachers
“We do not suggest by any means that this is the answer to all
For the study, 24 kindergarten students were placed in
“We were also interested in finding out if the visual displays were removed, whether the children’s attention would
However, when the researchers totaled all of the time children spent off-task in both types of classrooms, the rate of off-task
The researchers hope these findings will lead to further studies into developing guidelines to help teachers design classrooms
A.attracting | B.distracting | C.holding | D.paying |
A.confidence | B.relationship | C.consistency | D.focus |
A.gains | B.opportunities | C.needs | D.disabilities |
A.social | B.natural | C.physical | D.visual |
A.turn over | B.take down | C.try out | D.look into |
A.athletic | B.environmental | C.educational | D.communicative |
A.additional | B.prior | C.national | D.independent |
A.However | B.Besides | C.Therefore | D.Meanwhile |
A.stretch | B.adapt | C.concentrate | D.explore |
A.decorated | B.empty | C.transitional | D.laboratory |
A.teaching | B.classroom | C.school | D.personality |
A.accuracy | B.emphasis | C.impact | D.perspective |
A.refer | B.listen | C.respond | D.shift |
A.questions | B.behaviors | C.incidents | D.tasks |
A.originally | B.innovatively | C.appropriately | D.exclusively |