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Read the text about career-planning services.
Choose the best sentence from the opposite page to fill each of the gaps
.
For each gap 9– 14, mark one letter (A-H) on your Answer Sheet .
Do not use any letter more than once .
There is an example at the beginning .(0)
Your Career Path Can Lead You Anywhere
We used to be advised to plan our careers. We were told to make a plan during
the later stages of our education and continue with it through our working
lives.(0)_____ some people still see careers in this way. However, to pursue a
single option for life has always been unrealistic.
Planning for a single career assumes that we set out with a full
understanding of our likes and dislikes and the employment opportunities open to
us. (9)____ For most people this degree of certainty about the future does not
exist.
Our initial choice of career path and employer is often based on inadequate
knowledge and false perceptions. But with age and experience, we develop new
interests and aptitudes and our priorities alter. The structure of the
employment market and, indeed of employment itself, is subject to change as both
new technologies and new work systems are introduced (10) _____ We must face the
uncertainties of a portfolio career.
It is clear from the recent past that we cannot foresee the changes which
will affect our working lives. The pace of change is accelerating , as a result
of which traditional career plans will be of very limited use. (11)_____ They
will need updating to reflect changes in our own interests as well as in the
external work environment. Flexible workers already account for about half the
workforce. (12)______ We are likely to face periods as contract workers,
self-employed freelances, consultants, temps or part-timers.
Many employers encourage staff to write a personal development development
(PDP) (13)_____ Although some people use it only to review the skills needed for
their job, a PDP could be the nucleus of wider career plan –setting out
alternative long-term learning needs and a plan of self-development.
A report issued by the Institute of Employment Studies advises people to
enhance their employability by moving from traditional technical skills towards
the attainment of a range of transferable skills. (14)_____ Instead, special
schemes should be established to encourage people to examine their effectiveness
and to consider a wider range of needs.
0 A B C D E F G H
A This dual effect means that the relationship between employers and workers
has evolved to such and extent that we can no longer expect a long-term
relationship with one employer.
B. It carries an implicit assumption that we ourselves, and the jobs we
enter, will change little during our working lives.
C. This growth suggests that a career plan should not be expressed only in
terms of full-time employment but should make provision for the possibility of
becoming one of the.
D this is a summary of one’s personal learning needs and an action plan to
meet them.
E Consequently, they must now accommodate a number of objectives and enable
us to prepare for each on a contingency basis.
F However, it warns that employers often identify training needs through
formal appraisals, which take too narrow a view of development.
G . Such a freelance of consultant would be constantly in demand.
H We were expected to work towards that one clear goal and to consider a
career change as a bad thing.
Don't wash those fossils!
Standard museum practice can wash away DNA.
1.Washing, brushing and varnishing fossils — all standard conservation
treatments used by many fossil hunters and museum curators alike — vastly
reduces the chances of recovering ancient DNA.
2.Instead, excavators should be handling at least some of their bounty with
gloves, and freezing samples as they are found, dirt and all, concludes a paper
in the Proceedings of the National Academy of Sciences today.
3.Although many palaeontologists know anecdotally that this is the best way
to up the odds of extracting good DNA, Eva-Maria Geigl of the Jacques Monod
Institute in Paris, France, and her colleagues have now shown just how important
conservation practices can be.This information, they say, needs to be hammered
home among the people who are actually out in the field digging up bones.
4.Geigl and her colleagues looked at 3,200-year-old fossil bones belonging to
a single individual of an extinct cattle species, called an aurochs.The fossils
were dug up at a site in France at two different times — either in 1947, and
stored in a museum collection, or in 2004, and conserved in sterile conditions
at -20 oC.
5.The team's attempts to extract DNA from the 1947 bones all failed.The newly
excavated fossils, however, all yielded DNA.
6.Because the bones had been buried for the same amount of time, and in the
same conditions, the conservation method had to be to blame says Geigl."As much
DNA was degraded in these 57 years as in the 3,200 years before," she says.
Wash in, wash out
7.Because many palaeontologists base their work on the shape of fossils
alone, their methods of conservation are not designed to preserve DNA, Geigl
explains.
8.The biggest problem is how they are cleaned.Fossils are often washed
together on-site in a large bath, which can allow water — and contaminants in
the form of contemporary DNA — to permeate into the porous bones."Not only is
the authentic DNA getting washed out, but contamination is getting washed in,"
says Geigl.
9.Most ancient DNA specialists know this already, says Hendrik Poinar, an
evolutionary geneticist at McMaster University in Ontario, Canada.But that
doesn't mean that best practice has become widespread among those who actually
find the fossils.
10.Getting hold of fossils that have been preserved with their DNA in mind
relies on close relationships between lab-based geneticists and the excavators,
says palaeogeneticist Svante P bo of the Max Planck Institute for Evolutionary
Anthropology in Leipzig, Germany.And that only occurs in exceptional cases, he
says.
11.P bo's team, which has been sequencing Neanderthal DNA, continually faces
these problems."When you want to study ancient human and Neanderthal remains,
there's a big issue of contamination with contemporary human DNA," he says.
12.This doesn't mean that all museum specimens are fatally flawed, notes P
bo.The Neanderthal fossils that were recently sequenced in his own lab, for
example, had been part of a museum collection treated in the traditional way.But
P bo is keen to see samples of fossils from every major find preserved in line
with Geigl's recommendations — just in case.
Warm and wet
13.Geigl herself believes that, with cooperation between bench and field
researchers, preserving fossils properly could open up avenues of discovery that
have long been assumed closed.
14.Much human cultural development took place in temperate regions.DNA does
not survive well in warm environments in the first place, and can vanish when
fossils are washed and treated.For this reason, Geigl says, most ancient DNA
studies have been done on permafrost samples, such as the woolly mammoth, or on
remains sheltered from the elements in cold caves — including cave bear and
Neanderthal fossils.
15.Better conservation methods, and a focus on fresh fossils, could boost DNA
extraction from more delicate specimens, says Geigl.And that could shed more
light on the story of human evolution.
(640 words nature )
Glossary
Palaeontologists 古生物学家
Aurochs 欧洲野牛
Neanderthal (人类学)尼安德特人，旧石器时代的古人类。
Permafrost (地理)永冻层
Questions 1-6
Answer the following questions by using NO MORE THAN THREE WORDS for each
answer.
1.How did people traditionally treat fossils?
2.What suggestions do Geigl and her colleagues give on what should be done
when fossils are found?
3.What problems may be posed if fossil bones are washed on-site? Name
ONE.
4.What characteristic do fossil bones have to make them susceptible to be
contaminated with contemporary DNA when they are washed?
5.What could be better understood when conservation treatments are
improved?
6.The passage mentioned several animal species studied by researchers.How
many of them are mentioned?
Questions 7-11
Do the following statements agree with the information given in the passage?
Please write TRUE if the statement agrees with the writer FALSE if the statement
does not agree with the writer NOT GIVEN if there is no information about this
in the passage.
7.In their paper published in the Proceedings of the National Academy of
Sciences，Geigl and her colleagues have shown what conservation practices should
be followed to preserve ancient DNA.
8.The fossil bones that Geigl and her colleagues studied are all from the
same aurochs.
9.Geneticists don't have to work on site.
10.Only newly excavated fossil bones using new conservation methods suggested
by Geigl and her colleagues contain ancient DNA.
11.Paabo is still worried about the potential problems caused by treatments
of fossils in traditional way.
Questions 12-13
Complete the following the statements by choosing letter A-D for each
answer.
12.“This information” in paragraph 3 indicates:
[A] It is critical to follow proper practices in preserving ancient DNA.
[B] The best way of getting good DNA is to handle fossils with gloves.
[C] Fossil hunters should wear home-made hammers while digging up bones.
[D] Many palaeontologists know how one should do in treating fossils.
13.The study conducted by Geigl and her colleagues suggests:
[A] the fact that ancient DNA can not be recovered from fossil bones
excavated in the past.
[B] the correlation between the amount of burying time and that of the
recovered DNA.
[C] the pace at which DNA degrades.
[D] the correlation between conservation practices and degradation of
DNA.
