2．According to David.between the age 18 and 70.as women get older.how does the power of their hear——青夏教育精英家教网—

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2．According to David，between the age 18 and 70，as women get older，how does the power

of their hearts change？(no more than 5 words)

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试题详情

The ageold problem of why many women live longer than men has been solved.It’s their pumping power，British researchers have found.

On average，women live five years longer than men and women over the age of 60 are now the fastestgrowing section of the British population.

The average male heart becomes weaker with age，and by the age of 70 its power to pump blood around the body could have decreased by up to a quarter of its youthful strength.

David Goldspink，a professor of Cell and Molecular Sports Science at Liverpool John Moores University，said yesterday that women’s longevity is linked to the strength of their hearts.Unlike men，they pump just as strongly at 70 as they do at 20.

“We have found that the power of the male heart falls by 20-25 percent between　 18 and 70 years of age，”Professor Goldspink said.“However，over the same period there was no agerelated decline in the power of the female heart，meaning that the heart of a healthy 70yearold woman could perform almost as well as a 20yearold’s.”

The big difference between the sexes might explain why women live longer.The good news is that men of any age can improve the health of their heart simply by taking more regular exercise.

The results are based on the findings of a twoyear study of a crosssection of the British population，which examined the effects of ageing on the cardiovascular system(心血管系统)．

Professor Goldspink and a team of scientists at the university’s Research Unit for Human Development and Ageing examined more than 250 men and women between the age 18 and 80.

None of the volunteers had a habit of weekly exercise and all were considered to have low fitness levels，but were otherwise healthy.Each volunteer underwent five hours of tests to measure their blood pressure and the performance of their hearts while at rest and while they exercised on a treadmill(跑步机)．

The researchers found that the large arteries(大动脉)in the body became stiffer and less elastic(富有弹性的)with age，causing increased blood pressure.Blood flow to the muscles and skin of the limbs was also found to decrease.These changes were found to occur earlier in men，but women caught up much later.

1．Why do women live longer than men？(no more than 5 words)

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试题详情

AIDS(Acquired Immune Deficiency Syndrome)is a medical condition caused by HIV(Human Immunedeficiency Virus)，a virus which damages people’s natural defenses against disease.So far，no cure has been found for it.

In the early mid1980s，while other parts of the world were beginning to deal with the serious disease，Asia remained relatively unaffected by this newlydiscovered health problem.By the early 1990s，however，HIV and AIDS had hit several Asian countries，and by the end of that decade，HIV was spreading rapidly in many areas of the continent.Today，HIV and AIDS are a growing problem in every region of Asia.The latest statistics produced by UNAIDS suggest that in 2008，over 5 million people were living with HIV or AIDS in Asia.

Various factors cause the spread of HIV，including poverty，inequality，unequal status of women，cultural myths about sex and high levels of migration(移民)．Although it’s useful to understand the situation of AIDS in Asia as a whole，each country in the region faces a different situation.In Cambodia and Thailand，there has been evidence of declines in HIV infection levels.In Indonesia，Pakistan and Vietnam，meanwhile，the number of people living with HIV has rapidly increased.In China，the number of people newly infected with HIV and AIDS is also rising，although at a much slower pace.

Much improvement is needed to prevent HIV and AIDS around Asia.New guidelines and policy documents have been continually issued over the years.Most of the successful programs do have at least three features in common.Firstly，these programs encourage HIV and AIDS education among the general population to teach people how to avoid infection and to face discrimination.Secondly，they are very practical and they involve the infected people themselves in program design and implementation(实施)．Last but not least，strong leadership is essential for HIV prevention.If all of the leaders truly committed themselves to this cause，then a great many lives would be saved.

Overview of HIV and AIDS in Asia
The __1__of AIDS	HIV，a virus __2__ the body’s immune system.
The past situation	In the early mid1980s，with other parts of the world troubled with the serious disease，Asia remained __3__ by this newlydiscovered health problem. In the early 1990s，HIV and AIDS __4__ only several Asian countries，but HIV was spreading rapidly in the next 10 years in Asia.
The __5__ situation	AIDS/HIV is a growing problem in every region，over 5 million people __6__ HIV or AIDS. Asian countries are facing __7__ situations today.
The improvement to prevent HIV and AIDS	Most of the successful programs have __8__ in common. __9__ people to be educated about how to avoid infection and face discrimination. Being practical and getting the infected people __10__ in the program design and implementation. Leaders’ taking an active part in the cause.