题目内容
（请给出正确答案）
Men needed more than simple direct exchange as ______.
A．there were more and more goods the exchange rate of which couldn't be agreed on
B．farmers were reluctant to provide their grain and meat
C．marketplaces for simple exchange were insufficient
D．simple exchange was banned by law
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更多“Men needed more than simple di…”相关的问题
The word “this” (Para. 3, Line 1) the author means to say that ________.
A) there are more men on any given job than are needed
B) 33 per cent overmanning leads to 33 per cent less productivity
C) it is difficult to measure the intensity of work
D) Britons generally do not want to work too hard
"There were so many misperceptions out there about education and marriage that I decided to sort out the facts," said economist Betsey Stevenson, an assistant professor at the Wharton School at the University of Pennsylvania. So along with Wharton colleague Adam Isen, Stevenson calculated national marriage data from 1950 to 2008 and found that the marriage penalty women once paid for being well educated has largely disappeared.
"In other words, the difference in marriage rates between those with college degrees and those without is very small," said Stephanie Coontz, a family historian at Evergreen State College. The new analysis also found that while high-school dropouts(辍学学生) had the highest marriage rates in the 1950s, today college-educated women are much more likely to marry than those who don't finish high school.
Of course, expectations have changed dramatically in the last half century. "In the 1950s, a lot of women thought they needed to marry right away," Coontz said. "Real wages were rising so quickly that men in their 20s could afford to marry early. But they didn't want a woman who was their equal. Men needed and wanted someone who knew less." In fact, she said, research published in 1946 documented that 40 percent of college women admitted to playing dumb on dates. "These days, few women feel the need to play down their intelligence or achievements," Coontz said.
The new research has more good news for college grads. Stevenson said the data indicate that modern college-educated women are more likely to be married before age 40, are less likely to divorce, and are more likely to describe their marriages as "happy". The marriages of well-educated women tend to be more stable because the brides are usually older as well as wiser, Stevenson said.
Not long ago, it was believed that women went to college in order to ______.
A．find a husband
B．get smart in the marriage market
C．learn to be a good wife
D．marry someone with a bachelor's degree
Most Adults in US Have Low Risk of Heart Disease
More than 80 percent of US adults have a less than 10-percent risk of developing heart disease in the next 10 years, according to a report in the Journal of the American College of Cardiology. Just 3 percent have a risk that exceeds 20 percent.
"I hope that these numbers will give physicians, researchers, health policy analysts, and others a better idea of how coronary heart disease is distributed in the US population," lead author Dr. Earl S. Ford. from the Centers for Disease Control and Prevention in Atlanta, said in a statement.
The findings are based on analysis of data from 13,769 subjects, between 20 and 79 years of age, who participated in the Third National Health and Nutrition Examination Survey from 1988 to 1994.
Overall, 82 percent of adults had a risk of less than 10 percent, 15 percent had a risk that fell between 10 to 20 percent, and 3 percent had a risk above 20 percent.
The proportion of subjects in the highest risk group increased with advancing age, and men were more likely than women to be in this group. By contrast, race or ethnicity had little effect on risk distributions.
Although the report suggests that most adults have a low 10-year risk of heart disease, a large proportion have a high or immediate risk, Dr. Daniel S. Berman, from Cedars-Sinai Medical Center in Los Angeles, and Dr. Nathan D. Wong, from the University of California at Irvine, note in a related editorial.
Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward, they add.
The 10-year risk of heart disease is low for most US adults.
A．Right
B．Wrong
C．Not mentioned
Sleeping
People who sleep for more than eight hours a night do not live as long as those who sleep for six hours, according to the biggest study yet into sleep patterns and mortality
Scientists have no explanation for the findings and do not know if they mean people who like a lie-in (睡懒觉) can extend their lives by sleeping less.
Although it is a common belief that sleeping for at least eight hours a night is vital for health and well-being, the six-year study involving more than 1.1 million Americans older than 30 found that those who slept for less than eight hours were far from doing themselves any long-term harm.
"Individuals who now average 6.5 hours of sleep a night can be reassured that this is a safe amount of sleep. From a health standpoint, there is no reason to sleep longer, said Daniel Kripke, a professor of psychiatry (精神病学) at the University of California, San Diego.
Dr. Kripke said, "We don't know if long sleep periods lead to death. Additional studies are needed to determine if setting your alarm clock earlier will actually improve.The scientists，who were funded by the American Cancer Society, found that the best survival rates were among the men and women who slept for seven hours a night. Those who slept for eight hours were 12 per cent more likely to die during the six-year period of the study, when other factors such as diet and smoking were taken into account.
Even those who spent a mere five hours a night in bed lived longer than those who slept eight or more hours. However, an increasing death rate was found among those who slept for less than five hours.
Dr. Kripke said, "Previous sleep studies have indicated that both short- and long-duration (持续时间) sleep had higher mortality rates. However, none of those studies were large enough to distinguish the difference between seven and eight hours a night, until now."
第 16 题 More than one million Americans participated in the six-year study.
A．Right
B．Wrong
C．Not mentioned
根据下列文章,请回答 16～22 题。
Sleeping
People who sleep for more than eight hours a night do not live as long as those who sleep for Six hours，according to the biggest study yet into sleep patterns and mortality（死亡率）。
Scientists have no explanation for the findings and do not know if they mean people who like a lie-in（睡懒觉）can extend their lives by sleeping less.
Although it is a common I belief that sleeping for at least eight hours a night is vital for health and well-being，the six-year study involving more than l.1 million Americans Older than 30 found that those who slept for less than eight hours were far from doing themselves any long-term harm
"Individuals who now average 6.5 hours of sleeps a night can be reassured that this is a safe amount of sleep. From a health standpoint，there is no reason to sleep longer，" said Daniel Kripke，a professor of psychiatry（精神病学）at the University of California San Diego.
Dr.Kripke said，''We don't know if long sleep periods lead to death. Addition al Studios are needed to determine if setting your alarm clock earlier will actually improve your health." l he scientists who were funded by the American Cancer Society，found that the best survival rates were among the men and women who slept for seven hours a night. 1 hose who slept for eight hours were 12 per cent more likely to die during the six-year period of the study，when other factors such as diet and smoking were taken into account.
Even those who spent a mere five hours a night in bed lived longer than those who slept eight or more hours. However，an increasing death rate was found among those who slept for less than five hours. Dr.Kripke said，"Previous sleep studies have indicated that both short-and long-duration（持续时间）sleep had higher mortality rates-However-none of those studies was large enough to distinguish the difference between seven and eight hours a 1night.Until now"
第 16 题 More than one million Americans participated in the six-year study.
A．Right
B．Wrong
C．Not mentioned
There will be more women scientists than men scientists in the future.
A．Right
B．Wrong
C．Not mentioned
Sleeping
People who sleep for more than eight hours a night do not live as long as those who sleep for six hours, according to the biggest study yet into sleep patterns and mortality (死亡率).
Scientists have no explanation for the findings and do not know if they mean people who like a lie-in (睡懒觉) can extend their lives by sleeping less.
Although it is a common belief that sleeping for at least eight hours a night is vital for health and well-being, the six-year study involving more than 1.1 million Americans older than 30 found that those who slept for less than eight hours were far from doing themselves any long-term harm.
“Individuals who now average 6.5 hours of sleep a night can be reassured that this is a safe amount of sleep. From a health standpoint, there is no reason to sleep longer,” said Daniel Kripke, a professor of psychiatry (精神病学) at the University of California, San Diego.
Dr. Kripke said, “We don’t know if long sleep periods lead to death. Additional studies are needed to determine if setting your alarm clock earlier will actually improve your health.”
The scientists, who were funded by the American Cancer Society, found that the best survival rates were among the men and women who slept for seven hours a night. Those who slept for eight hours were 12 per cent more likely to die during the six-year period of the study, when other factors such as diet and smoking were taken into account.
Even those who spent a mere five hours a night in bed lived longer than those who slept for eight or more hours. However, an increasing death rate was found among those who slept for less than five hours.
Dr. Kripke said, “Previous sleep studies have indicated that both short and long duration (持续时间) sleep had higher mortality rates. However, none of those studies were large enough to distinguish the difference between seven and eight hours a night, until now.”
More than 1.1 million Americans participated in the six-year study.
A．Right
B．Wrong
C．Not mentioned
Men are more likely to skip breakfast than women.
A．Right
B．Wrong
C．Not mentioned
？？Men are more likely to skip breakfast than women？？
A.Right
B.Wrong
C.Not mentioned
