[单项选择]Why do men die earlier than women The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.
The largest study of the effects of aging on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.
"We have found that the power of the male heart falls by 20—25 percent between 18 and 70 years of age," said the head of the study, David Goldspink of Liverpool John Moores University in the UK.
"Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men," said Goldspink. "This is part of the aging process."
What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.
"This gender difference might just e
A. health
B. long life
C. aging
D. effect

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[单项选择]Why do men die earlier than women The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.
The largest study of the effects of aging on the heart has found that women’s longevity may be linked to the fact that their hearts do not lose their pumping power with age.
"We have found that the power of the male heart falls by 20—25 percent between 18 and 70 years of age," said the head of the study, David Goldspink of Liverpool John Moores University in the UK.
"Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men," said Goldspink. "This is part of the aging process."
What surprises scientists is that the female heart sees very little loss of these cells. A healthy 70-year-old woman’s heart could perform almost as well as a 20-year-old one’s.
"This gender difference might just e
A. men’ s heart cells
B. women’ s aging process
C. the gender difference
D. hearts and long life

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[单项选择] That question "why women live longer than men" can be answered at two levels. An evolutionary biologist would tell you that it is because women get evolutionary bonus points from living long enough to help bring up the grandchildren. Men, by contrast, wear themselves out competing for the right to procreate in the first place. That is probably true, but not much help to the medical profession. However, a group of researchers at John Moores University has just come up with a medically useful answer. It is that while 70-year-old men have the hearts of 70-year-olds, those of their female peers resemble the hearts of 20-year-olds. David Goldspink and his colleagues looked at 250 volunteers aged between 18 and 80 over two years. All the volunteers were healthy but physically inactive. The team’’s principal finding was that the power of the male heart falls by 20-25% between the ages of 18 and 70, while that of the female heart remains undiminished. They found that between the age
A. female sex hormone can increase blood flow
B. female sex hormone can be beneficial to blood vessels
C. female heart function hardly drops when oestrogen levels fall greatly
D. female heart function improves though not obviously

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[判断题]

Depression is commoner in women than in men.

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[单项选择]Passage Four

Women earn less than men do. For example, in 1998 the hourly wages of women in the U. S. were 26% less than those of men. The gap between male and female incomes varies with age. The gap between the labor incomes of young women and young men varies. It’s also clear that jobs in which women are concentrated pay less. The larger the number of workers who are women in ran industry, the lower the average wages.
Why do women earn less than men do Can the differences be explained by the fact that women are looked down upon If so, the government has to intervene(干预), to force the employers to pay equal wages to equal jobs. However, there is no agreement among economists about the causes of the gap. One view argues that women, on the average, have chosen low-paying jobs in which workers enjoy the freedom of entering and leaving the lab
A. there are more than enough women in the labor force
B. women have more freedom in selecting jobs
C. women are only provided with low-paid jobs
D. women are less experienced than men

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{{B}}Text 1{{/B}}

Why do men die earlier than women The latest research makes it known that the reason could be that men’s hearts go into rapid decline when they reach middle age.
The largest study of the effects of aging on the heart has found that women’s {{U}}longevity{{/U}} may be linked to the fact that their hearts do not lose their pumping power with age.
"We have found that the power of the male heart falls by 20—25 percent between 18 and 70 years of age," said the head of the study, David Goldspink of Liverpool John Moores University in the UK.
"Within the heart there are millions of cells that enable it to beat. Between the age of 20 and 70, one-third of those cells die and are not replaced in men," said Goldspink. "This is part of the aging process."
What surprises scientists is that the female heart sees very
A. health
B. long life
C. aging
D. effect

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