题目内容
In the United States, elementary and middle schools are advised to give students two and a half hours of physical activity a week.
Yet many schools across the country have reduced their physical education programs. Criticism（批评） of the cuts has led in some places to efforts to give students more time for exercise, not less.
A study reported that life expectancy（寿命） has fallen or is no longer increasing in some parts of the United States. The situation is worst among poor people in the southern states, and especially women. Public health researchers say it is largely the result of increases in obesity（肥胖）, smoking and high blood pressure. They also blame differences in health services around the country.
A study found that only four percent of elementary schools provided daily physical education all year for all grades. This was true of eight percent of middle schools and two percent of high schools. The study also found that twenty-two percent of all schools did not require students to take any P.E.
Charlene Burgeson is the executive director of the National Association for Sport and Physical Education. She says one problem for P.E. teachers is that schools are under pressure to put more time into academic subjects. Also, parents may agree that children need exercise in school.
But experts say P.E. classes have changed. They say the goal has moved away from competition and toward personal performance, as a way to build a lifetime of activity. These days, teachers often lead activities like weight training.
Some parents like the idea of avoiding competitive sports in P.E. class. Yet others surely dislike that idea. In the end, schools may find themselves in a no-win situation.
1. . How many reasons have caused some Americans’ life expectancy to fall?
|
A．Three. |
B．Four. |
C．Five. |
D．Six. |
2. The underlined part “that idea” (the last paragraph) refers to _______.
|
A．competitive sports |
B．a lifetime of activity |
|
C．no-win situation |
D．uncompetitive exercise |
3. . From the passage we can infer that _______.
|
A．physically active children have more chances to be fit when growing up |
|
B．most American schools let students take physical activity enough |
|
C．the older a student is, the less exercise he gets |
|
D．not all parents think exercise is good for students |
4. . The passage mainly tells us about _______.
|
A．school and students’ health |
B．how to make children healthy |
|
C．American schools’ physical education |
D．American students’ health |
1.B
2.D
3.A
4.C
【解析】
1. 细节题 在第二段和第三段，四个原因是reduced the physical education programs, obesity, smoking, high blood pressure
2. 细节题 最后一段的第一句话
3. 推理题 文章主要讲学校的体育教育故可推测出答案A
4. 推理题 文章主要讲美国学校的体育教育
科学实验活动册系列答案Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict how just three grams less a day would affect heart disease in the United States.
The result：10％ fewer heart attacks. 8％ fewer strokes. 4％ fewer deaths. 11％ fewer new cases of heart disease. And 240 billion dollars in health care savings.
Researchers found it could prevent 10，000 heart attacks and 9。200 deaths every year.
The study is in the New England Journal of Medicine. Kirsten Bibbins-Domingo at the University of California San Francisco was the lead author. She says people would not even notice a difference in taste with three grams， or one-half teaspoon，less salt per day. The team also included researchers at Stanford and Columbia Uni versity.
Each gram of salt contains four hundred milligrams of sodium（钠），which is how foods may list their salt content.
The government says the average American man eats ten grams of salt a day. The American Heart Association advises no more than three grams for healthy people. It says salt in the American diet has increased fifty percent since the nineteen seventies， while blood pressures have also risen. Less salt can mean a lower blood pressure.
New York City Mayor Michael Bloomberg is leading an effort called the National Salt Reduction Initiative. The idea is to put pressure on food companies and restaurants. Critics call it government interference.
Mayor Bloomberg has already succeeded in other areas， like requiring fast food places in the city to list calorie information. Now a study by the Seattle Children’s Research Institute shows that the calorie information on the menu can influence what parents order for their children.
【小题1】We can tell from the passage that now heart attacks occur in the US every year.
| A．240，000 | B．900，000 | C．100，000 | D．92，000 |
| A．all the heart diseases result from eating too much salt |
| B．the American Heart Association suggests less than 3 grams of salt a day for everyone |
| C．Americans ate no more than 5 grams of salt per day in the 1970s |
| D．the less salt one eats， the healthier he will be |
| A．Bloomberg has made some other efforts to improve people’s health |
| B．Bloomberg is very successful in his career |
| C．parents must pay great attention to calorie information |
| D．a new study is being done about calorie information |
Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict how just three grams less a day would affect heart disease in the United States.
The result：10％ fewer heart attacks. 8％ fewer strokes. 4％ fewer deaths. 11％ fewer new cases of heart disease. And 240 billion dollars in health care savings.
Researchers found it could prevent 10，000 heart attacks and 9。200 deaths every year.
The study is in the New England Journal of Medicine. Kirsten Bibbins-Domingo at the University of California San Francisco was the lead author. She says people would not even notice a difference in taste with three grams， or one-half teaspoon，less salt per day. The team also included researchers at Stanford and Columbia Uni versity.
Each gram of salt contains four hundred milligrams of sodium（钠），which is how foods may list their salt content.
The government says the average American man eats ten grams of salt a day. The American Heart Association advises no more than three grams for healthy people. It says salt in the American diet has increased fifty percent since the nineteen seventies， while blood pressures have also risen. Less salt can mean a lower blood pressure.
New York City Mayor Michael Bloomberg is leading an effort called the National Salt Reduction Initiative. The idea is to put pressure on food companies and restaurants. Critics call it government interference.
Mayor Bloomberg has already succeeded in other areas， like requiring fast food places in the city to list calorie information. Now a study by the Seattle Children’s Research Institute shows that the calorie information on the menu can influence what parents order for their children.
1.We can tell from the passage that now heart attacks occur in the US every year.
|
A．240，000 |
B．900，000 |
C．100，000 |
D．92，000 |
2.It can be inferred from the passage that .
|
A．all the heart diseases result from eating too much salt |
|
B．the American Heart Association suggests less than 3 grams of salt a day for everyone |
|
C．Americans ate no more than 5 grams of salt per day in the 1970s |
|
D．the less salt one eats， the healthier he will be |
3.The last paragraph mainly tells us .
|
A．Bloomberg has made some other efforts to improve people’s health |
|
B．Bloomberg is very successful in his career |
|
C．parents must pay great attention to calorie information |
|
D．a new study is being done about calorie information |