About one million Americans are diagnosed annually with skin cancer.A:every year B:severely C:actively D:every month

共用题干
More about Alzheimer's Disease
Scientists have developed skin tests that may be used in the future to identify people with Alzheimer's disease and may ultimately allow physicians to predict who is at risk of get-ting this neurological disorder.
The only current means of diagnosing the disease in a living patient is a long and expen-sive series of tests that eliminate every other cause of dementia.
“Since Aloes Alzheimer described the disease nearly a century ago,people have been trying to find a way to accurately diagnose it in its early stages,“said Patricia Grady,acting director of the National Institute of Neurological Disorders and Stroke in Bethesda,Mary-land."This discovery,if confirmed,could prove a big step forward in our efforts to deal with and understand the disease.”
Alzheimer's is the single greatest cause of mental deterioration in older people,affecting between 2.5 million and 4 million people in the United States alone. The devastating disorder gradually destroys memory and the ability to function,and eventually causes death. There is currently no known treatment for the disease.
Researches discovered that the skin cells of Alzheimer's patients have defects that inter-fere with their ability to regulate the flow of potassium in and out of the cells.The fact that the cell defects are present in the skin suggests that Alzheimer's results from physiological changes throughout the body,and that dementia may be the first noticeable effect of these changes as the defects affect the cells in the brain,scientists said.
The flow of potassium is especially critical in cells responsible for memory formation. The scientists also found two other defects that affect the cells'supply of calcium,another critical element.
One test developed by researches calls for growing skin cells in a laboratory culture and then testing them with an electrical detector to determine if the microscopic tunnels that govemn the flow of potassium are open. Open potassium channels create a unique electrical signature.
A spokesman for the Alzheimer's Association said that if the validity of the diagnostic
test can be proven it would be an important development,but cautioned that other promising
tests for Alzheimer's have been disappointing.

Which of the following about the relationship between Alzheimer's and dementia is true?
A: Dementia is one of the signs of Alzheimer's.
B: Alzheimer's is one of the causes of dementia.
C: They are two completely different diseases.
D: They are similar defects of the human brain.

共用题干
Sunbath and Skin Cancer
In the summer,millions of Americans will offer up their bodies to the sun rays.A tan mndi-cates health and beauty,and most sun worshippers will sacrifice a lot to achieve it,including themselves.
With each hour, the sun's ultraviolet radiation (紫外线）produces irreversible（不可逆的） damage,hastening the development of unsightly wrinkles.And with each year on the beach or roof-top,the sunbather increases his risk of getting skin cancer. Skin cancer is by far the most common form of cancer. An estimated 400,000 new cases will be detected this year in the United States, and almost all of them can be blamed on over-exposure to the sun.
Fortunately,most of these cancers are highly curable .But they can he disfiguring and take time to treat. For that reason,sun worshippers should treat deity with a good deal of awe（敬畏）. Sunburn,of course,is the initial hazard posed by UV radiation.Prolonged exposure to UV,howev-er , interferes with the production of collagen fibers（胶原纤维）in the dermis（真皮层）, causing the skin to lose elasticity（弹性）and creating premature wrinkles. Further deterioration（恶化）of the dermis deprives the epidermis（表皮层）of nutrition and causes it to become thin and dry.
Cancer is UV's final result.Shortwave radiant energy,especially from the UV-B band,breaks the strands（股、缕）of DNA. Enzymes（酶）work constantly to rearrange the DNA into proper Se-quence,but with repeated UV exposure,the repair process may eventually break down.Then the mutant（变异的）DNA may produce a colony of cancer cells. But skin cancer may be avoided with a good dose of common sense.People with fair skin and blue eyes who burn easily stand the high-est risk .Special danger spots are the parts of the body most constantly exposed to the sun,such as the cheeks , nose , lower lip and the ears. People who have already developed precancerous（癌变前的）lesions（伤害）or had one skin-cancer growth stand a greatly increased chance of developing others.
Dermatologists（皮肤科医生）recommend avoiding the sun when it is most intense between 11 a.m.and 3 p.m.Anyone who insists on sunbathing should use a good sun screen.These lotions and salves（药膏）contain chemicals that block out the burning UVB radiation while permitting the tanning rays to reach the skin.

The underlined word“deity”in the third paragraph refers to________.
A: something mysterious
B: the skin cancer
C: the sun
D:over-exposure to the sun

With computer users linker to the Internet growing ( ) every year, business is trying to cash in on the worldwide network.
A. at million B. with a million
C. with one million D. by the million

共用题干
第三篇

A Debate on the English Language

A measure declaring English the national language is under intense debate in the United States. The US Senate passed two declarations last week.One calls English the nation's official language
and the other says it is the "common and unifying（统一的）"tongue. But Americans found themselves divided on the issue.
Since people worldwide know that most Americans speak only English,many can't understand why the issue is so controversial（有争议的）.
"The discussion is related to fears of immigration issues,"says Dick Tucker,a social scientist at Pittsburgh's Carnegie Mellon University."It's related to a worry about the changing demography （人口统计）of the US. It's a worry about who will continue to have political and economic influence.
In fact,the notion of protecting the language has been kicked around almost since the nation's founding. John Adams lobbied（游说）in 1780 for the creation of a national academy to correct and improve the English language. But his proposal died, since lawmakers saw it as a royalist（保皇主义者）attempt to define personal behavior.
Since then,the country hasn't had a national language,but the idea of recognizing the special status of English lived on.
The emotions surrounding language resurface（再次浮现）not because people feel comfortable with English.It is more about the discomfort many Americans feel with the new languages,says Walt Wolfram,a professor at North Carolina State University.
"Language is never about language,"he says.
According to the 2000 US Census Bureau report,of 209 million Americans over 18 years old, 172 million speak only English at home.About 37 million speak languages other than English. Among them,6.5 million speak poor English and 3.1 million don't speak English at all.

Which of the following is the current debate NOT related to?
A:The immigration issues.
B:The changing demography.
C:The worry about the new languages.
D:The US's military strength.

共用题干
第二篇

Call American Their Names

A great difference between American social customs and those of other countries is the way in which names are used.Americans have little concern for"rank",especially socially. Most Americans do not want to be treated in any especially respectful way because of their age or social rank;it makes them feel uncomfortable.Many Americans even find the terms"Mr.","Mrs."or"Miss" too formal.People of all ages may prefer to be called by their first names."Don't call me Mrs. Smith.Just call me Sally."Using only first names usually indicates friendliness and acceptance. However,if you do not feel comfortable using only first names,it is quite acceptable to be more formal.Just smile and say that after a while you will use first names but you are accustomed to being more when you first meet someone.
Very often,introductions are made using both first and last names:"Mary Smith,this is John Jones."In this situation you are free to decide whether to call the lady"Mary"or"Miss Smith". Sometimes both of you will begin a conversation using last names,and after a while one or both of you may begin using first names instead.You have a choice:if you don't want to use first names so quickly, no one will think it impolite if you continue according to your own custom.

In the first paragraph the author tells us that______.
A:Americans do not talk about rank,especially socially
B:Americans feel uncomfortable when talking about rank
C:Americans take interests in social customs
D:Americans don't care much about social rank

共用题干
A Debate on the English Language
A measure declaring English the national language is under intense debate in the United States .The US Senate passed two declarations last week.One calls English the nation's official lan-guage and the other says it is the “common and unifying（统一的）”tongue. But Americans found themselves divided on the issue.
Since people worldwide know that most Americans speak only English,many can't understand
why the issue is so controversial（有争议的）.
“The discussion is related to fears of immigration issues,”says Dick Tucker,a social scientist at Pittsburgh's Carnegie Mellon University.“It's related to a worry about the changing demography （人口统计）of the US It's a worry about who will continue to have political and economic influence.”
In fact,the notion of protecting the language has been kicked around almost since the nation's founding. John Adams lobbied（游说）in 1780 for the creation of a national academy to correct and improve the English language.But his proposal died,since lawmakers saw it as a roy-alist（保皇主义者）attempt to define personal behavior.
Since then,the country hasn't had a national language,but the idea of recognizing the special status of English lived on.
The emotions surrounding language resurface（再次浮现）not because people feel comfortable with English .It is more about the discomfort many Americans feel with the new languages,says Walt Wolfram,a professor at North Carolina State University.
“Language is never about language,”he says.
According to the 2000 US Census Bureau report,of 209 million Americans over 18 years old, 172 million speak only English at home.About 37 million speak languages other than English. Among them,6 .5 million speak poor English and 3 .1 million don't speak English at all.

What are the two declarations concerned with?
A:.The status of the English language.
B: The protection of new languages.
C: The rights to speak one's mother tongue.
D: The improvement of the English language.

共用题干
US Blacks Hard-hit by Cancer
Death rates for cancer are falling for all Americans,but black Americans are still more likely to die of cancer than whites,the American Cancer Society said Monday.
In a special report on cancer and blacks,the organization said blacks are usually diagnosed with cancer later than whites,and they are more likely to die of the disease.
This could be because of unequal access to medical care,because blacks are more likely to have other diseases like diabetes as well,and perhaps because of differences in the biology of the cancer itself,the report added.
“In general,African Americans have less likelihood of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis,”the report said.
“In describing cancer statistics for African Americans,this report recognizes that socioeconomic disparities and unequal access to medical care may underlie many of the differences associated with race.”
The Cancer Society said blacks should be encouraged to get check-ups earlier,when cancer was more treatable,and it said more research is needed to see if biological differences play a role.
“The new statistics emphasize the continuing importance of eliminating these social disparities through public policy and education efforts,”the organization said in a statement.
But it also noted a drop in cancer death rates.
“Cancer death rates in both sexes for all sites combined have declined substantially among black Americans since 1992,as have incidence rates,”said the report.
“Increased efforts to improve economic conditions in combination with education about the relationship of lifestyle choices to cancer could further reduce the burden of cancer among African Americans.” About 36 million Americans describe themselves as black,representing about 12 percent of the population.

Black Americans are more likely to die of cancer than________.
A:.people in other countries
B:.white Americans
C:.all other Americans
D:.their ancestors

共用题干
US Blacks Hard-hit by Cancer
Death rates for cancer are falling for all Americans,but black Americans are still more likely to die of cancer than whites,the American Cancer Society said Monday.
In a special report on cancer and blacks,the organization said blacks are usually diagnosed with cancer later than whites,and they are more likely to die of the disease.
This could be because of unequal access to medical care,because blacks are more likely to have other diseases like diabetes as well,and perhaps because of differences in the biology of the cancer itself,the report added.
“In general,African Americans have less likelihood of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis,”the report said.
“In describing cancer statistics for African Americans,this report recognizes that socioeconomic disparities and unequal access to medical care may underlie many of the differences associated with race.”
The Cancer Society said blacks should be encouraged to get check-ups earlier,when cancer was more treatable,and it said more research is needed to see if biological differences play a role.
“The new statistics emphasize the continuing importance of eliminating these social disparities through public policy and education efforts,”the organization said in a statement.
But it also noted a drop in cancer death rates.
“Cancer death rates in both sexes for all sites combined have declined substantially among black Americans since 1992,as have incidence rates,”said the report.
“Increased efforts to improve economic conditions in combination with education about the relationship of lifestyle choices to cancer could further reduce the burden of cancer among African Americans.” About 36 million Americans describe themselves as black,representing about 12 percent of the population.

Public policy and education efforts may help to do away with________.
A: death rates
B: various cancers
C: unfair social differences
D: biological differences

共用题干
Us Blacks Hard-hit by Cancer
Death rates for cancer are falling for all Americans,but black Americans are still more likely to die of cancer than whites,the American Cancer Society said Monday. In a special report on cancer and blacks,the organization said blacks are usually diagnosed with cancer later than whites,and they are more likely to die of the disease.
This could be because of unequal access to medical care,because blacks are more likely to have other diseases like diabetes as well,and perhaps because of differences in the biology of the cancer itself,the report added. "In general,African Americans have less likelihood of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis,"the report said.
"In describing cancer statistics for Mrican Americans,this report recognizes that socioeconomic disparities and unequal access to medical care may underlie many of the differences associated with race." The Cancer Society said blacks should be encouraged to get check-ups earlier,when cancer is more treatable,and it said more research was needed to see if biological differences play a role.
"The new statistics emphasize the continuing importance of eliminating these social disparities through public policy and education efforts,"the organization said in a statement. But it also noted a drop in cancer death rates.
"Cancer death rates in both sexes for all sites combined have declined substantially among African Amnericans since 1992,as have incidence rates,"said the report. "Increased efforts to improve economic conditions in combination with education about the relationship of lifestyle choices to cancer could further reduce the burden of cancer among African Americans."
About 36 million Americans describe themselves as black,representing about 12 percent of the population.

Which may NOT be a reason for higher cancer death rates among US blacks?
A:Unequal access to medical care.
B:Greater probability of having other diseases.
C:Differences in the biology of the cancer.
D:Early diagnosis.

How much on average is the European Tissue business worth a month?__________

A.Around 8.5 billion euros
B.About 10 million dollars
C.About 708 million euros
D.Around 833 billion dollars

共用题干
Sunbath and Skin Cancer
In the summer,millions of Americans will offer up their bodies to the sun rays.A tan mndi-cates health and beauty,and most sun worshippers will sacrifice a lot to achieve it,including themselves.
With each hour, the sun's ultraviolet radiation (紫外线）produces irreversible（不可逆的） damage,hastening the development of unsightly wrinkles.And with each year on the beach or roof-top,the sunbather increases his risk of getting skin cancer. Skin cancer is by far the most common form of cancer. An estimated 400,000 new cases will be detected this year in the United States, and almost all of them can be blamed on over-exposure to the sun.
Fortunately,most of these cancers are highly curable .But they can he disfiguring and take time to treat. For that reason,sun worshippers should treat deity with a good deal of awe（敬畏）. Sunburn,of course,is the initial hazard posed by UV radiation.Prolonged exposure to UV,howev-er , interferes with the production of collagen fibers（胶原纤维）in the dermis（真皮层）, causing the skin to lose elasticity（弹性）and creating premature wrinkles. Further deterioration（恶化）of the dermis deprives the epidermis（表皮层）of nutrition and causes it to become thin and dry.
Cancer is UV's final result.Shortwave radiant energy,especially from the UV-B band,breaks the strands（股、缕）of DNA. Enzymes（酶）work constantly to rearrange the DNA into proper Se-quence,but with repeated UV exposure,the repair process may eventually break down.Then the mutant（变异的）DNA may produce a colony of cancer cells. But skin cancer may be avoided with a good dose of common sense.People with fair skin and blue eyes who burn easily stand the high-est risk .Special danger spots are the parts of the body most constantly exposed to the sun,such as the cheeks , nose , lower lip and the ears. People who have already developed precancerous（癌变前的）lesions（伤害）or had one skin-cancer growth stand a greatly increased chance of developing others.
Dermatologists（皮肤科医生）recommend avoiding the sun when it is most intense between 11 a.m.and 3 p.m.Anyone who insists on sunbathing should use a good sun screen.These lotions and salves（药膏）contain chemicals that block out the burning UVB radiation while permitting the tanning rays to reach the skin.

The last paragraph of the passage mainly discusses_______.
A: the treatment of the skin cancer
B: the prevention of the skin cancer
C: the parts of the body where cancer is most likely to develop
D: the lotions that work best in fighting against the skin cancer

共用题干
第三篇

A Debate on the English Language

A measure declaring English the national language is under intense debate in the United States. The US Senate passed two declarations last week.One calls English the nation's official language
and the other says it is the "common and unifying（统一的）"tongue. But Americans found themselves divided on the issue.
Since people worldwide know that most Americans speak only English,many can't understand why the issue is so controversial（有争议的）.
"The discussion is related to fears of immigration issues,"says Dick Tucker,a social scientist at Pittsburgh's Carnegie Mellon University."It's related to a worry about the changing demography （人口统计）of the US. It's a worry about who will continue to have political and economic influence.
In fact,the notion of protecting the language has been kicked around almost since the nation's founding. John Adams lobbied（游说）in 1780 for the creation of a national academy to correct and improve the English language. But his proposal died, since lawmakers saw it as a royalist（保皇主义者）attempt to define personal behavior.
Since then,the country hasn't had a national language,but the idea of recognizing the special status of English lived on.
The emotions surrounding language resurface（再次浮现）not because people feel comfortable with English.It is more about the discomfort many Americans feel with the new languages,says Walt Wolfram,a professor at North Carolina State University.
"Language is never about language,"he says.
According to the 2000 US Census Bureau report,of 209 million Americans over 18 years old, 172 million speak only English at home.About 37 million speak languages other than English. Among them,6.5 million speak poor English and 3.1 million don't speak English at all.

Who suggested in the 18th century that English should be protected?
A:Walt Wolfram.
B:John Adams.
C:Royalists.
D:Dick Tucker.

共用题干
第三篇

A Debate on the English Language

A measure declaring English the national language is under intense debate in the United
States.The US Senate passed two declarations last week.One calls English the nation's
official language and the other says it is the "common and unifying（统一的）"tongue.But
Americans found themselves divided on the issue.
Since people worldwide know that most Americans speak only English,many can't
understand why the issue is so controversial（有争议的）.
"The discussion is related to fears of immigration issues,"says Dick Tucker,a social
scientist at Pittsburgh's Carnegie Mellon University."It's related to a worry about the
changing demography（人口统计）of the US.It's a worry about who will continue to have
political and economic influence."
In fact,the notion of protecting the language has been kicked around almost since the
nation's founding.John Adams lobbied（游说）in 1780 for the creation of a national
academy to correct and improve the English language.But his proposal died,since
lawmakers saw it as a royalist（保皇主义者）attempt to define personal behavior.
Since then,the country hasn't had a national language,but the idea of recognizing the
special status of English lived on.
The emotions surrounding language resurface（再次浮现）not because people feel
comfortable with English.It is more about the discomfort many Americans feel with the new
languages,says Walt Wolfram, a professor at North Carolina State University.
"Language is never about language,"he says.
According to the 2000 US Census Bureau report,of 209 million Americans over 18
years old,172 million speak only English at home.About 37 million speak languages other
than English.Among them,6.5 million speak poor English and 3.1 million don't speak
English at all.

The phrase "kicked around" (paragraph 4)could be best replaced by
A:"invented".
B:"formed".
C:"shaped".
D:"discussed".

共用题干
A Debate on the English Language
A measure declaring English the national language is under intense debate in the United States .The US Senate passed two declarations last week.One calls English the nation's official lan-guage and the other says it is the “common and unifying（统一的）”tongue. But Americans found themselves divided on the issue.
Since people worldwide know that most Americans speak only English,many can't understand
why the issue is so controversial（有争议的）.
“The discussion is related to fears of immigration issues,”says Dick Tucker,a social scientist at Pittsburgh's Carnegie Mellon University.“It's related to a worry about the changing demography （人口统计）of the US It's a worry about who will continue to have political and economic influence.”
In fact,the notion of protecting the language has been kicked around almost since the nation's founding. John Adams lobbied（游说）in 1780 for the creation of a national academy to correct and improve the English language.But his proposal died,since lawmakers saw it as a roy-alist（保皇主义者）attempt to define personal behavior.
Since then,the country hasn't had a national language,but the idea of recognizing the special status of English lived on.
The emotions surrounding language resurface（再次浮现）not because people feel comfortable with English .It is more about the discomfort many Americans feel with the new languages,says Walt Wolfram,a professor at North Carolina State University.
“Language is never about language,”he says.
According to the 2000 US Census Bureau report,of 209 million Americans over 18 years old, 172 million speak only English at home.About 37 million speak languages other than English. Among them,6 .5 million speak poor English and 3 .1 million don't speak English at all.

Which statement is true according to the 2000 US Census Bureau report?
A: 172 million Americans speak only English in their workplaces.
B: 37 million Americans speak English.
C: 209 million Americans are above the age of 18.
D: 6.5 million Americans speak good English.

About one million Americans are diagnosed annually with skin cancer.

A: every year
B: severely
C: actively
D: every month

共用题干
US Blacks Hard-hit by Cancer
Death rates for cancer are falling for all Americans,but black Americans are still more likely to die of cancer than whites,the American Cancer Society said Monday.
In a special report on cancer and blacks,the organization said blacks are usually diagnosed with cancer later than whites,and they are more likely to die of the disease.
This could be because of unequal access to medical care,because blacks are more likely to have other diseases like diabetes as well,and perhaps because of differences in the biology of the cancer itself,the report added.
“In general,African Americans have less likelihood of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis,”the report said.
“In describing cancer statistics for African Americans,this report recognizes that socioeconomic disparities and unequal access to medical care may underlie many of the differences associated with race.”
The Cancer Society said blacks should be encouraged to get check-ups earlier,when cancer was more treatable,and it said more research is needed to see if biological differences play a role.
“The new statistics emphasize the continuing importance of eliminating these social disparities through public policy and education efforts,”the organization said in a statement.
But it also noted a drop in cancer death rates.
“Cancer death rates in both sexes for all sites combined have declined substantially among black Americans since 1992,as have incidence rates,”said the report.
“Increased efforts to improve economic conditions in combination with education about the relationship of lifestyle choices to cancer could further reduce the burden of cancer among African Americans.” About 36 million Americans describe themselves as black,representing about 12 percent of the population.

Which may NOT be a reason for higher cancer death rates among US blacks?
A: Unequal access to medical care.
B: Greater probability of having other diseases.
C: Differences in the biology of the cancer.
D:.Early diagnosis.

共用题干
Us Blacks Hard-hit by Cancer
Death rates for cancer are falling for all Americans,but black Americans are still more likely to die of cancer than whites,the American Cancer Society said Monday. In a special report on cancer and blacks,the organization said blacks are usually diagnosed with cancer later than whites,and they are more likely to die of the disease.
This could be because of unequal access to medical care,because blacks are more likely to have other diseases like diabetes as well,and perhaps because of differences in the biology of the cancer itself,the report added. "In general,African Americans have less likelihood of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis,"the report said.
"In describing cancer statistics for Mrican Americans,this report recognizes that socioeconomic disparities and unequal access to medical care may underlie many of the differences associated with race." The Cancer Society said blacks should be encouraged to get check-ups earlier,when cancer is more treatable,and it said more research was needed to see if biological differences play a role.
"The new statistics emphasize the continuing importance of eliminating these social disparities through public policy and education efforts,"the organization said in a statement. But it also noted a drop in cancer death rates.
"Cancer death rates in both sexes for all sites combined have declined substantially among African Amnericans since 1992,as have incidence rates,"said the report. "Increased efforts to improve economic conditions in combination with education about the relationship of lifestyle choices to cancer could further reduce the burden of cancer among African Americans."
About 36 million Americans describe themselves as black,representing about 12 percent of the population.

Carcer is more treatable if it is detected______.
A:in an early stage
B:together with other diseases
C:during check-ups
D:in elderly people

共用题干
AIDS

The World Health Organization(WHO)says as many as 10 million persons worldwide
may have the virus that causes AIDS（艾滋病）.Experts believe about 350, 000 persons
have the disease.And one million more may get it in the next five years. In the United
States,about 50,000 persons have died with AIDS.The country's top medical official
says more than 90 percent of all Americans who had the AIDS virus five years ago are
dead.
There is no cure for AIDS and no vaccine（疫苗）or medicine to prevent it. However,
researchers know much more about AIDS than they did」ust a few years ago.We now know
that AIDS is caused by a virus.The virus invades healthy cells,including white blood cells
that are part of our defense system against disease.It takes control of the healthy cell's
genetic material and forces the cell to make a copy of the virus.The cell then dies.And the
virus-caused particles move on to invade and kill more healthy cells.
The AIDS virus is carried in a person's body fluids.The virus can be passed sexually or
by sharing instruments used to take intravenous（进入静脉的）drugs. It also can be passed
in blood products or from a pregnant woman with AIDS to her developing baby.
Many stories about the spread of AIDS are false.You cannot get AIDS by working or
attending school with someone who has the disease.You cannot get it by touching drinking
glasses or other objects used by such persons.Experts say no one has gotten AIDS by
living with,caring for or touching an AIDS patient.

According to the WHO,there are now 10 million AIDS patients in the world.
A:Right
B:Wrong
C:Not mentioned