题目
题型：同步题难度：来源：
nightmare. Some parents try to get rid of half of the candy after their children go to bed, but dentists
say parents also need to separate the good kinds of treats from the bad ones.
It is not exactly what a child eats that truly matters, but how much time it stays in his mouth.
According to pediatric dentist Dr. Kaneta Lott, the most damaging stuff is something that is sticky or
very hard and thus stays in the mouth for a long time.This is because we all have bacteria in our mouths.
When we eat, the bacteria take our food as their food and produce an acid that destroys the surface
of the teeth, causing cavities to form. The longer the food stays in the mouth, the more likely cavities
will develop. Therefore, potato chips are worse than candy because they get stuck between teeth. For
the same reason, raisins and crackers are not the best choice. Hard candies take a long time to
consume and are also a bad choice for Halloween treats.
If children really love candy, dentists recommend that they eat chocolate instead. Unlike hard
candies, chocolate dissolves quickly in the mouth.Besides, chocolate contains tannins, which help to
kill some of the bacteria in the mouth.But no matter what a child eats, brushing after each meal is still
the best way to fight cavities.
B. To point out the problems with Halloween celebrations.
C. To tell parents what sweets are less damaging to their children’s teeth.
D. To teach parents the meaning of Halloween candy for their children.
B. They contain too much sugar.
C. They help bacteria to produce tannins.
D. They stay in the mouth for a long time.
B. Crackers.
C. Raisins.
D. Potato chips.
B. They help to get rid of some bacteria in the mouth.
C. They help chocolate to dissolve more quickly.
D. They destroy the surface of the teeth.
答案
核心考点
试题【 Most American kids love Halloween treats, but a bucket of Halloween candy c】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
I have allergies(过敏反应). It feels like something is in my throat. What is it and what should I do to
help it?
Christa
Dear Christa:
You might be feeling mucous in your throat.The membranes there make mucus to keep nasal
passages(鼻腔)moist and clean and to warm the air that we breathe.But sometimes our bodies make
too much mucus, and it can collect at the back of the throat. Drinking lots of liquids, especially warm
ones, may help.
Dear Dr. Cory:
Sometimes when I don’t wear any socks with my shoes I get blisters(水疱). What are blisters? How
can I avoid them?
Jacy
Dear Jacy:
Blisters occur when something(like the back of your shoe)rubs against your skin and causes tiny
blood vessels to leak fluid(液体). The blister acts like a pillow to protect damaged skin while it repairs
itself.
The best way to prevent blisters is to avoid“rubbing”spots.If the problem is your shoes, wear socks
and shoes that fit to help prevent blisters.
Dear Dr. Cory:
I like reading your column. It tells me a lot about the body and how it works. I have a question for
you: I have not been airing my feet out lately and the bottoms of them have been turning crisp(起皱的)
and the skin is peeling. Why?
Aaron
Dear Aaron:
People whose feet get wet or sweaty while wearing shoes may develop athlete"s foot, caused by a
fungus that likes warm, damp skin. The fungus is easily passed from one person to another, so public
places such as locker rooms or showers are real hot spots. It"s most common during summer in people
who rarely remove their shoes, and in people who sweat a lot. It can cause bumps, redness, itching,
and peeling of the skin, often between the toes.
Anti-fungus cream, now available without a prescription(处方), cures the infection. Your doctor or
health care provider can help find the cause of the problem.
B. Let it be for it can repair itself.
C. Consult a doctor immediately.
D. Remove the mucus immediately.
B. Dr.Cory often writes some books about health.
C. Athletes are more likely to have foot problems.
D. You can cure infection without the help of doctors.
B. wearing suitable socks and shoes can prevent blisters
C. blood vessels will leak fluid if rubbed
D. the best way to cure blisters is to avoid rubbing spots
B. not airing his feet out
C. fungus
D. rarely removing his shoes
B. health problems
C. suggestions about diet
D. knowledge about medicine
health problems linked to being overweight.
The WHO says a major reason for the rising obesity rates is an increase in imported foods. It says
many Pacific islanders have replaced their traditional diets of vegetables and fruits with imported
processed foods.
Dr. Temu Waqanivalu is with the World Health Organization"s South Pacific office in Suva, Fiji. He
says many of the imported products lack nutritional value.
Temu Waqanivalu said: "In some of the places, you"d be amazed to see how a bottle of Coke is
cheaper than a bottle of water. I think that represents the kind of offenvironment we"ve created that
doesn"t really encourage or make lifestyle choices an easy choice for the population."
And a lack of physical activity among many Pacific islanders only adds to the obesity problem.
The WHO says more than 50 percent of the population is overweight in at least ten Pacific island
countries. The rate is as high as 80 percent among women in the territory of American Samoa. Fiji had
the lowest obesity rate at 30 percent.
In all, almost ten million people live in Pacific island countries. The WHO estimates that about 40
percent of them have health disorders related to diet and nutrition.
Diabetes rates are among the highest in the world. Fortyseven percent of the people in American
Samoa have diabetes. So do 44 percent of the people in Tokelau, a territory of New Zealand.
By comparison, the diabetes rate is 13 percent in the United States, a country that has its own
problems with rising obesity.
Officials also note an increase in nutritional problems like anemia and not enough vitamin A in the
diets of Pacific islanders. Dr. Waqanivalu says treating conditions related to obesity and diet puts
pressure on limited health resources and budgets.
B. the change of eating habits
C. the change of life style
D. lack of exercise
B. they are popular
C. they are tasty
D. they are convenient to get
B. 4 million.
C. 6 million.
D. 10 million.
B. steady
C. worrying
D. low
has reached its goal of banking 10 percent by 2010.
The Millennium Seed Bank Project, run by Kew Gardens-one of the oldest botanical gardens-will
officially deposit the 24,200th species on Thursday, a pink, wild banana from China.
More than 50 countries are now on board with Kew"s giant task but vast places of the globe,
including India and Brazil, still need to join in and donate seeds, director Paul Smith said.
The seed bank is one of the largest and most diverse in the world with more than 1.5 billion seeds.
Its goal is to help protect the planet"s biodiversity during a time of climate change.
The wild banana seed is under threat of extinction(灭绝)in Southwest China from agricultural
development.It is a vital food source for Asian elephants and important for growing bananas for human
consumption.
Stored at minus 20 degrees centigrade, the seeds can last for thousands of years and await the day
that scientists hope never comes-when the species no longer exist in the wild.
It is a race against time, Smith said, because in the last decade alone, 20 plants held in the bank have
already been wiped out in the wild. He estimates that between a third and a quarter will become extinct
this century.
"It is urgent and it is happening now. An area, the size of England, is cleared of primary vegetation
(植被)every year," Smith said.
Because most of the world"s food and medicines come from nature, protecting wild plant species is
quite important, scientists say. There are already many other seed banks safeguarding food crops, which
only account for 0.6 percent of plant diversity.
For Kew"s next goal-to collect a quarter of wild varieties by 2020-the botanists need 10 million
pounds a year, or a further 100 million pounds on top of the 40 million they have already been granted.
B. To safeguard food crops.
C. To protect wild plants from extinction.
D. To help scientists study wild plants.
B. the climate change in this area
C. the large number of Asian elephants
D. human"s large consumption
B. India and Brazil haven"t joined in the Seed Bank Project at present
C. there is only one seed bank in the world at present
D. the wild plants in places like India and China will never die out
B. The Millennium Seed Bank Project.
C. Britain"s seed bank.
D. Kew Gardens" next goal.
B. The temperature condition of the conservative wild plant species.
C. The government"s financial support for the seed bank project.
D. Scientists" concern on the extinct wild plant species.
that those things are important,I believe that everyone should start to__2__more on a growing problem-
global warming.
Global warming will not only__3__our country and our generation,but also the entire__4__and future
generations.It is__5__because the weather has been a lot warmer over the past few years,which__6__the
melting(融化) of the ice in the Antarctic.This will soon cause water levels to__7__and flood parts of the
world.Many people ignore this problem because they feel__8__ they can"t do anything about it and have
more__9__things to worry about.If we all__10__so,then our ozone layer(臭氧层) will be__11__and the
planet will no longer be able to make life continue to exist.We should do our best to limit the use of our
planet"s__12_resources(资源) and keep our air clean._13_,future generations will suffer from our__14_.
Some might feel that they can"t stop global warming from__15__.But if every single person does his or
her part in keeping the air clean,then it will become a__16__effort.Sure,there are some things that cause
pollution and that we won"t be able to__17__change.This may include cars burning oil,but we can__18__
adjust some of these things.People can start carpooling,taking the bus,riding their bikes,or__19__just
walking.If everyone takes__20__now,I believe we can start seeing remarkable results within a few years.
( )2．A.depend
( )3．A.annoy
( )4．A.world
( )5．A.failing
( )6．A.lies in
( )7．A.reduce
( )8．A.as if
( )9．A.popular
( )10．A.do
( )11．A.protected
( )12．A.unlimited
( )13．A.Therefore
( )14．A.illnesses
( )15．A.continuing
( )16．A.physical
( )17．A.slightly
( )18．A.at least
( )19．A.yet
( )20．A.time
B．focus
B．interrupt
B．continent
B．completing
B．results in
B．rise
B．in case
B．suitable
B．keep
B．strengthened
B．natural
B．Otherwise
B．failures
B．arriving
B．mental
B．fully
B．at most
B．even
B．turns
C．hang
C．affect
C．industry
C．changing
C．suffers from
C．drop
C．even though
C．important
C．like
C．destroyed
C．recycled
C．However
C．decisions
C．improving
C．national
C．hardly
C．at first
C．still
C．action
D．remark
D．confuse
D．climate
D．occurring
D．escapes from
D．move
D．if only
D．difficult
D．find
D．surrounded
D．industrial
D．Instead
D．mistakes
D．disappearing
D．worldwide
D．slowly
D．at last
D．thus
D．arms
year. The gases released include carbon dioxide, a major cause of global warming.
Twenty-one nations around the world recently joined forces to better understand and prevent
greenhouse gas emissions from farms. The Global Research Alliance on Agricultural Greenhouse Gases
was launched at the United Nations conference on climate change. The meeting took place in
Copenhagen, Denmark last month.
Agricultural experts blame a number of farm activities for producing greenhouse gases. For
example, animal waste and cattle digestive systems release methane(甲烷, 沼气)gas. Fertilized soil
and the burning of crop waste also release harmful gases into the air. Experts say some methods of
farming-turning the soil to prepare for planting-also release harmful carbon dioxide.
An official of the European Commission"s Directorate General for Research says agricultural
greenhouse gas emissions can be cut. Maive Rute suggests feeding animals a diet designed to reduce
emissions.
The new agricultural research group says protecting against global warming is only part of its
purpose. It says the world also needs to develop better farming methods to feed growing populations
in poor countries.
United States Agriculture Secretary Tom Vilsack said no one single nation can fight agricultural
greenhouse gas emissions and increase food production at the same time. This is why the alliance is
important for combining resources and finding new ones.
The United States Department of Agriculture will increase spending on farm emissions research by
ninety million dollars over the next four years. The total will reach one hundred and thirty million dollars.
The U. S. D. A. will share the research with other countries in the Global Research Alliance on
Agricultural Greenhouse Gases and support researchers from developing countries that belong to the
alliance. Money from the Borlaug Fellowship Program will let the researchers study agricultural climate
change with American scientists.
Mister Vilsack said that just as climate change has no borders, there should be no borders for
research.
B. changing cattle digestive systems
C. developing better farming methods
D. giving animals the food meant to produce fewer emissions
B. an agreement signed between countries
C. a program or project set up for a research
D. an organization formed for different goals
B. 220 million dollars.
C. 40 million dollars.
D. 90 million dollars.
B. introduce the Copenhagen conference held last month
C. appeal to more countries to cut agricultural emissions
D. inform readers of the major cause of global warming
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