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The cause of AIDS remains a mystery to researchers．
A．Right
B．Wrong
C．Not mentioned
答案
更多“The cause of AIDS remains a mystery to researchers． A．RightB．WrongC．Not mentio”相关的问题
第1题
The cause of AIDS remains a mystery to researchers
A．Right
B．Wrong
C．Not mentioned
第2题
The cause of AIDS remains a mystery to researchers．
A．Right
B．Wrong
C．Not mentioned
第3题
The likely cause of the increased rates of HIV/AIDS is the lack of______.
A．access to often expensive anti-retroviral treatments
B．effective communication in Asia-Pacific region
C．international cooperation between countries
D．education of the harm of HIV/AIDS
第4题
But that fact has helped Sir John Sulston win the 2002 Nobel Prize for Medicine. Sir John is the founder of the Sanger Institute in Cambridge, which was set up in 1992 to get further understanding of the human genome (染色体组).
To help them do this, they turned to the worm. The nematode (线虫类的) worm is one of the earliest creatures on planet earth. It is less than one millimeter long, completely transparent and spends its entire life digging holes through sand. But it still has lots to say about human life, and
what can be done to make it better.
What the worm told Sir John and his colleagues was that each of cells in the human body is programmed like a computer. They grow, develop and die according to a set of instructions that are coded in our genetic make-up.
Many of the diseases that humans suffer from happen when these instructions go wrong or are not obeyed. When the cell refuses to die but carries on growing instead, this leads to cancer. Heart attacks and diseases hke AIDS cause more cell deaths than normal, increasing the damage they do to the body. Sir John was the first scientist to prove the existence of programmed cell death.
Sir John Sulston got a Nobel Prize for Medicine because he has ______.
A．found that human beings are similar to the worm
B．got the fact we share 40 percent of our genetic structure with the simple worm
C．found the computer which controls each of the cells in the human body
D．proved that cell death is programmed
第5题
Interviewer：Sorry for the inconvenience it may cause you.Interviewee：__________．
A.You’re welcome
B.Never mind
C.Nothing else
D.It’s OK
第6题
W: Look at the prices of foods and vegetables. No wonder they're so expensive.
Q: What are they talking about？
(14)
A．The effects of the flood.
B．The heroic fight against a flood.
C．The cause of the flood.
D．Floods of the past twenty years.
第7题
听力原文： According to UNAIDS (联合国艾滋病规划署) estimates, there were 38.6 million adults and 3.2 million children living with HIV at the end of 2002, and during the year 5 million new people became infected with the virus. Around half of all people who become infected with HIV do so before they are 25 and are killed by AIDS before they are 35.95% of the total number of people with HIV live in the developing world. But HIV still remains a threat to people of all ages and nationalities.
Discrimination is the theme of the 2003 World AIDS Day. In many parts of the world, discrimination prevents people who are known to have HIV from securing a job or caring for their families. Discrimination can cause isolation. This can prevent people who have HIV and AIDS from being offered or seeking the treatment which could save their lives.
In order for HIV to be effectively tackled on an international level, efforts need to be made to end the discrimination against people with HIV and AIDS; educate people in safer sex and drug use, using appropriate media; provide condoms freely to people in the developing world; provide financial and medical assistance so that people with HIV and AIDS can be treated.
Started in 1988, World AIDS Day is not just about raising money, but also about raising awareness, education and fighting prejudice. World AIDS Day is also important in reminding people that HIV has not gone away, and that there are many things still to be done.
(20)
A．5 million.
B．38.6 million.
C．3.2 million.
D．41.8 million.
第8题
【M1】
第9题
Attitudes to AIDS Now
Most people say that the USA is making progress in fighting AIDS, but they don't know there's no cure and strongly disagree that "the AIDS epidemic is over," a new survey finds.
The findings, released Thursday by the Kaiser Family Foundation, reassure activists who have worried that public concern about AIDS might disappear in light of recent news about advances in treatment and declines in deaths.
"While people are very optimistic about the advances, they're still realistic about the fact that there is no cure," says Sophia Chang, director of HIV programs at the foundation.
The Kaiser survey, like a recent USA TODAY Gallup Poll, does find that the number of people ranking AIDS as the country's top health problem has fallen. In the Kaiser Poll, 38% say it's the top concern, down from 44% in a 1996 poll; in the Gallup Poll, 29% say AIDS is No.1, down from 41% in 1992 and 67% in 1987.
Other findings from Kaiser, which polled more than 1,200 adults in September and October and asked additional questions of another 1,000 adults in November:
52% say the country is making progress against AIDS, up from 32% in 1995. 51% say the government spends too little on AIDS. 86% correctly say AIDS drugs can now lengthen lives; an equal number correctly say that the drugs are not cures. 67% incorrectly say that AIDS deaths increased or stayed the same in the past year; 24% know deaths fell. Daniel Zingale, director of AIDS Action Council, says, "I'm encouraged that the American people are getting the message that the AiDS epidemic isn't over. I hope the decision-makers in Washington are getting the same message ..."
We have seen signs of complacency.
What do activists worry about？
A．Recent news about AIDS is not tree.
B．People may stop worrying about AIDS.
C．Deaths caused by AIDS may not decline.
D．Advances in AIDS treatment are too slow.
第10题
Among the devastating consequences of AIDS has 【21】______ its epidemic spread in the developing world. The disease has caused 【22】______ suffering, debilitation, loss of life and disruption of family, social and economic 【23】______ Because of the considerable expense and logistical difficulty in providing antiviral drugs to populations 【24】______ with the Human Immunodeficiency Virus 【25】______ the world, the biomedical community is looking towards vaccines to help solve this compelling problem.
The search for an AIDS vaccine began more than 15 years ago with great 【26】______ and high expectations. With the 【27】______ of the Human Immunodeficiency Virus (HIV) as the cause of AIDS, it seemed that a 【28】______ would follow closely behind. But despite a large concerted effort, the problem has proven more difficult than 【29】______ , and progress has not 【30】______ the 【31】______ hopes. Here I review the 【32】______ scientific obstacles confronting the development of an effective HIV vaccine, and I consider 【33】______ strategies to overcome these obstacles.
It is instructive to consider the circumstances that have 【34】______ to past successes in vaccine development. The smallpox vaccine is 【35】______ the most successful inventions in the history of 【36】______ Why, 200 years ago, without the benefit of modern biotechnology, did the smallpox vaccine succeed so readily while an AIDS vaccine 【37】______ elusive？ The answer lies in an experiment of nature that provided, to an astute observer, a clear direction for smallpox vaccine development. In this classic story of 【38】______ discovery, Edward Jennet noticed that milk maids who had previously contracted cowpox were 【39】______ to smallpox infection. This observation was the critical event leading to the finding that the cowpox virus cross-reacted immunologically with the smallpox virus and could 【40】______ be used to protect against smallpox.
【21】
A．on
B．with
C．been
D．about
