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人类活动已经对生态系统造成严重破坏。
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Asian economies will continue to expand rapidly in the next two years on the
back of foreign investments, exports and domestic demand, but will not be free
of worries, according to a recent securities company economic report. Massive
infrastructure spending, the benefits of past investments and deregulation and
growing regional trade will push along regional growth.
The report tipped China’s gross domestic product to grow by 9.5 per cent in
1996 and 10.5 per cent in 1997, and Hong Kong’s to grow by 4.3 and 5.0 per cent.
Singapore’s real GDP was forecast to grow by 7.6 and 7.4 per cent, Malaysia’s by
8.6 and 8.1 per cent, Thailand’s by 8.8 and 8.4 per cent, Indonesia’s by 7.3 and
7.1 per cent and Philippines’ by 5.6 and 5.8 per cent.
“However, all is not rosy,” cautioned the report, which listed overheating as
the region’s biggest challenge in the short term and skilled-labor shortages in
the long run.
It cited strains from rapid growth that had begun to stretch current account
deficits and spur inflation in some regional economies, which could prevent
their central banks from lowering interest rates.
“This implies that economic vulnerability to unexpected shocks will remain
high,” the report said, forecasting a further tightening of monetary policy in
countries such as the Philippines and Malaysia, and no significant easing in
Thailand, Indonesia and China.
Crosby Securities also cited massive new investment programs generated by
demands on infrastructure such as power, telecommunications and transport which
had fuelled over-heating.
It said Asia would also face a bigger challenge from newly deregulating
economies in Eastern Europe which offered lower costs and better-educated
workers to foreign investors.
Asia’s main foreign investors should, however, continue to expand their
presence in the region, the securities house said, noting new trends of
intra-Asian investment.
Singapore is shifting its lower value-added disc drive and electronics
industry to Malaysia, which in turn is moving some of its garment-making and
consumer electronics manufacturing to Indonesia and Thailand. Thailand, Malaysia
and Singapore are increasingly investing in Viet Nam, Myanmar and Laos.
“Asia will benefit from this trend in several ways,” the report said.
( )1Asia economy will continue to grow because of _____________.
A. foreign investment B. demands in Asian countries.
C. export D. all of the above
( )2 In the next 2 years, the highest economic growth will appear in
____________.
A. Singapore B. Thailand
C. Hong Kong D. China
( )3 Years later, the problem in Asian economy may be _________________.
A. too little investment B. too much investment
C. not enough qualified labors D. monetary instability
( )4 According to this report, economic changes in East Europe are
___________.
A. harmful B. challenging
C. helpful D. useless
( )5 The report is about the prospect of Asian economy.
A. optimistic B. pessimistic
C. more optimistic than pessimistic D. more pessimistic than optimistic
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We are introducing ourselves as one of the leading exporters of the same line
of business.
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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.
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题目：Invitation Letter邀请与约见函
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Nowadays it is more convenient and easier for people to travel to other countries. Do you think the positive effects exceed the negative effects?
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毁林对环境的破坏是长期的。
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Exercise physiologist
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The Brain and the Computer
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These illnesses translate into higher benefits costs for the company as
employees more frequently use health care benefits.