题目内容
（请给出正确答案）
How did researchers know that ancient Greeks rushed to watch the Olympics？
A．Thousands of people came to watch.
B．The main stadium is still not big enough.
C．They have found the related record of events.
D．Many of them were visitors and pilgrims.
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更多“How did researchers know that …”相关的问题
Scientists have defined a new age concept and believe it could explain why populations are aging, but at the same time seem to be getting younger.
Instead of measuring aging by how long people have lived, the scientists have factored in how many more years people can probably still look forward to.
"Using that measure, the average person can get younger in the sense that he or she can have even more years to live as time goes on," said Warren Sanderson of the University of New York in Stony Brook.
He and Sergei Scherbov of the Vienna lnstitute of Demography (人口统计学) at the Austrian (奥地利的) Academy of Sciences, have used their method to estimate how the proportion of elderly people in Germany, Japan and the United States will change in the future.
The average German was 39.9 years old in 2000 and could plan to live for another 39.2 years, according to research reported in the journal Nature on Wednesday.
However, by 2050 the average German will be 51.9 years old and will be expected to live another 37.1 years. So middle age in 2050 would occur at around 52 years instead of 40 years as in 2000.
"As people have more and more years to live they have to save more and plan more and they effectively are behaving as if they were younger," said Sanderson.
Five years ago, the average American was 35.3 years old and could plan for 43.5 more years of life. By 2050, the researchers estimate it will increase to 41.7 years and 45.8 future years.
"A lot of our ski/Is, our education, our savings and the way we dear with our health care depend a great deal on how many years we have to live," said Sanderson.
This dimension of how many years people have to live has been completely ignored in the discussion of aging so far.
第36题：People 40 years of age today seem to be as young as
A．their parents were at the same age.
B．their parents were at the age of 30.
C．their children will be at the same age.
D．their children will be at the age of 30.
A.if the program Readers is popular
B.how does the program Readers begin
C.when did the program Readers begin
D.whether is the program Readers popular
A.In the morning.
B.Very well.
C.In the library.
D.By taking a course.
How did the author react to Jennie's relationship with her boy friend？
A．She tried her best to dissuade Jennie from continuing it.
B．She threatened to break up with Jennie if her advice was ignored.
C．She was overcome with pride that Jennie told her about her boy friend.
D．She was very angry with Jennie for choosing such a friend.
1.The passagesays that Watt made the first widely used steam engine.
A.T
B.F
2.Watt made up a unit of measurement based on the strength of a horse.
A.T
B.F
3.Watt wanted to find a way to lift a 3300-pound weight.
A.T
B.F
4.One horsepower would equal the weight a horse could lift.
A.T
B.F
5.The title of the passageis "How the Term Horsepower Came into Being".
A.T
B.F
