题目内容
（请给出正确答案）
27 Cancer occurs when cells in the body divide without .
28 Gene alterations may be caused by .
29 Treatment for cancer may also bring about some .
30 Cancer patients may differ in their .
A prescription medicines
B control or order
C tolerance for pain
D various factors
E different genes
F side effects
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更多“27 Cancer occurs when cells in…”相关的问题
A. prescription medicines
B. control or order
C. tolerance for pain
D. various factors
E. normal genes
F. side effects
Cancer occurs when cells in the body divide without______.
Global Cancer Rates to Rise by 50% by 2020
The number of new cancer cases worldwide is expected to increase by 50% by the year 2020. But a new report suggests that as many as a third of new cancers could be avoided by adopting healthier lifestyles and through public health action.
The World Cancer Report, released by the International Agency for Research on Cancer, shows that cancer has now emerged as a major public health threat in developing countries as well as rich ones.
Overall, cancer was responsible for 12% of all deaths in 2000. But in many countries more than a quarter of all deaths are caused by cancer.
The report shows that 10 million new cancers were diagnosed globally in 2000, and that number is expected to rise to 15 million by 2020. Researchers say most of that increase will mainly be due to steadily aging populations in both developed and developing countries and current trends in smoking and other unhealthy habits.
"Cancer has emerged as a major public health problem in developing countries for the first time, matching its effect in industrialized (工业化的) countries," said researcher Paul Kleihues, MD, director of IARC, in a news release. "Once considered a 'Western' disease, the Report highlights that more than 50 percent of the world's cancer burden, in terms of both numbers of cases and deaths, already occurs in developing countries."
The risk of being diagnosed with cancer in developed countries is double that in less-developed ones. However, the risk of dying from cancer is much higher in developing countries, where 80% of cancer patients already have late-stage incurable tumors (肿瘤) at the time of diagnosis.
Researchers say cancer rates have traditionally been higher in developed countries due to greater exposure to tobacco, occupational carcinogens (致瘤物), and an unhealthy Western diet and lifestyle. As less-developed countries become industrialized and more prosperous, they tend to adopt the high-fat diet and low physical activity levels typically seen in the West, which increase cancer rates.
The report says that steps could be taken to reduce about
A．50% of new cancers.
B．33% of new cancers.
C．12%of new cancers.
D．80% of new cancers.
根据下列文章,请回答 31～35 题。
Global Cancer Rates to Rise by 50%by 2020
The number of newcancer cases worldwide is expected to；increase by 50%by the year 2020．But a new report suggests that asmany as a third of new cancers could be avoided by adopting healthier lifestyles and through public healthaction．
The World CancerReport，released by the International Agency for Research on Cancer, shows that cancer has now emerged asa major public health threat in；developing countries as well as rich ones．Overall．cancerwas responsible for 12%Of all deaths il3 2000．But in many countries more than aquarter of all deaths are caused by cancer．
The reportshows that l o million new cancers were diagnosed globally in 2000，and that numberis expected to rise t0 1 5 million by 2020．Researchers say most of thatincrease will mainly be due to steadily aging populations in both developed and,developing countries and current trends in smoking and other unhealthy habits．
”Cancer has emerged as a major public healthproblem in developing countries for the first time，matching its effect inindustrialized(工业化的)countries，”said researcher Paul Kleihues，MD．director of IARC，ina news release．”once considered a ”western, disease，the Report highlights thatmore than 50 percent of the world’s cancer burden．in” terms of both numbers ofcases and deaths．already Occurs in developing countries．” The risk of beingdiagnosed with cancer in developed countries is double that in less-developedones．However, the risk of dying from cancer is much bigger in developed countries，where80%of cancer patients already have late—stage incurable tumors(肿瘤)at the timeof diagnosis．
Researchers say Cancer rates have traditionallybeen higher in developed countries due to greater exposure to tobacc0，occupationalcarcinogens(致癌物)，and an unhealthy Western diet and lifestyle．As less—developedcountries become industrialized and more prosperous。they tend to adopt thehigh—fat diet and low physical activity levels typically seen In the West，whichincrease cancer rates．
第 31 题 The report says that steps could be taken toreduce about
A．50%of new cancers．
B．33%of new cancers．
C．12%of new cancers．
D．80%of new cancers．
Clobal Cancer Rates to Rise 50% by 2020
The number of new cancer cases worldwide is expected to increase by 50% by the year 2020. But a new report suggests that as many as a third of new cancers could be avoided by adopting healthier lifestyles and through public health action.
The World Cancer Report, released by the International Agency for Research on Cancer (IARC, part of the World Health Organization), shows that cancer has now emerged as a major public health threat in developing countries as well as affluent ones.
Overall, cancer was responsible for 12% of all heaths in 2000. But in many countries more than a quarter of all deaths are caused by cancer.
The report shows that 10 million new cancers were diagnosed globally in 2000, and that number is expected to rise to 15 million by 2020. Researchers say most of that increase will mainly be due to steadily aging populations in both developed and developing countries and current trends in smoking and other unhealthy habits.
"Cancer has emerged as a major public health problem in developing countries for the first time, matching its effect in industrialized countries," says researcher Paul Kleihues, MD, director of IARA, in a news release. "Once considered a 'Western' disease, the Report highlights that more than 50 percent of the world's cancer burden, in terms of both numbers of cases and deaths, already occurs in developing countries."
The risk of being diagnosed with cancer in developed countries is double that in less-developed ones. However, the risk of dying from cancer is much higher in developing countries, where 80% of cancer patients already have late-stage incurable tumors at the time of diagnosis.
Researchers say cancer rates have traditionally been higher in developed countries due to greater exposure to tobacco, occupational carcinogens, and an unhealthy Western diet and lifestyle. As less-developed countries become industrialized and more prosperous, they tend to adopt the high-fat diet and low physical activity levels typically seen in the West, which increase cancer rates.
According to a new report, healthier lifestyles and public health action could help reduce about ______.
A．50% of new cancers
B．33% of new cancers
C．12% of new cancers
D．80% of new cancers
1 ) the distribution of killers in different decades and the general trend in these decades
2 ) the possible reasons for the distribution of these killers in the city
Killers in Every 100 Deaths
Period Cancer Heart disease Traffic Accidents Other Causes 1970s 2l 16 7 38 1980s 28 26 15 31 1990s 27 27 21 25
This conclusion does not depend on the unrealistic assumption that we can 【29】______ tobacco. It merely assumes that we can reduce cigarette sales appreciably by raising prices or by 【30】______ on the type of education that already appears to have a 【31】______ effect 【32】______ cigarette assumption by white-collar workers and that we can substantially reduce the amount of tar 【33】______ per cigarette.
The practicability of preventing cancer by such measures applies not only in those countries, such as, the United States of America, because cigarette smoking has been common for decades, 25 to 30 percent of all cancer deaths now involves lung cancer, but also in those where it has become 【34】______ only recently. China is a good example. Countries where cigarette smoking is only becoming widespread can expect enormous increase in lung cancer during the 1990’s or early in the next century, 【35】______ prompt effective action is taken 【36】______ the habit.
There are three reasons 【37】______ the prevention of lung cancer is of such overwhelming importance: first, the disease is extremely common, causing more deaths than any other type of cancer now 【38】______ ; secondly, it is generally incurable; and finally, 【39】______ tobacco consumption will also have a substantial 【40】______ on many other diseases.
【21】
A．publicly
B．hardly
C．widely
D．reliably
Alzheimer’s Disease: Are We Close to Finding a Cure？
First described in 1906 by Dr.Alois Alzheimer, Alzheimer s disease is the most common form. of dementia, accounting for around 60%–80% of cases.It is characterized by problems with memory, thinking and behavior.Onset is most common in individuals aged 65 and over, although people in their 40s and 50s can develop what is classed as early - onset Alzheimer’s.
Alzheimer’s is a progressive disease, meaning memory loss is mild in the beginning, but it worsens over time to the extent that individuals are unable to have conversations or respond to their surroundings.There are treatments that have been approved by the US
Food and Drug Administration (FDA) for Alzheimer’s.For example, cholinesterase inhibitors and memantine can help treat memory and thinking problems.But these drugs just help manage the symptoms; there is currently no cure for the disease.
Current Alzheimer’s prevalence in the US makes it the 6th leading cause of death, killing more than half a million seniors every year.To put this in perspective, Alzheimer’s disease currently kills more people each year than prostate cancer and breast cancer combined.There is no doubt that scientists across the world are working hard to find ways to prevent, treat and cure this debilitating condition.Hardly a day goes by without coming across a report about how scientists restored memory and learning deficits in Alzheimer’s mouse models, how vitamin D deficiency could increase the risk of developing dementia, and how DNA methylation in the brain is linked to Alzheimer’s.But what have these studies taught researchers about Alzheimer’s so far？
Preventing and Targeting Plaques and Tangles
As with all diseases, knowing exactly what causes Alzheimer’s is key to identifying ways to prevent and treat the condition.Past research has indicated that Alzheimer’s occurs when two abnormal brain structures — plaques and tangles —damage and kill nerve cells, causing the memory, thinking and behavioral problems associated wit
1.Dementia is not a single disease in itself, but a general term to describe symptoms of impairment in memory, communication, and thinking.()
2.The FDA - approved drugs, like cholinesterase inhibitors and memantine, can cure Alzheimer’s disease.()
3.chronic sleep deprivation may cause these abnormal brain structures.()
4.Tangles are fragments of a protein called beta - amyloid, which build up in areas between nerve cells.()
5.As a result of Alzheimer’s research, there are an array of drugs in development that scientists believe have great potential to effectively treat the disease.()
