Exercise can result in iron loss.

Aerobic exercise is most 8 for weight loss.

根据以下材料，回答题

Exercise Can Replace Insulin （胰岛素 ） for Elderly Diabeties （糖尿病）

Most older people with so-called type II diabetes could stop taking insulin if they would do brisk exercise for 30 minutes just three times a week， according to new medical research results reported in the Copenhagen newspaper Berlingske Tidende on Monday.

Results from tests conducted on diabetics at the Copenhagen Central Hospital Rigshospitalet"s Center for Muscle Research showed that physical exercise can boost the body"s ability to utilize insulin by 30 per cent， the newspaper reported.

This is equal tol the effect most elderly diabetics get from their insulin medication today， it said.

Researchers had a group of non-diabetic men and a group of men with type II， all more than 60 years of age， exercise on bicycles six times a week for three months. After the three months the doctors measured how much sugar the test subjects" muscles could utilize as a measure for how well their insulin worked.

Associate Professor Dr. Flemming Dela of the Muscle Research Center said the tests demonstrated that the exercising diabetics had just as high insulin utilization as the healthy non-exercising persons.

"This means that the insulin works just as well for both groups. Physical exercise cannot cure people of diabetes， but it can eliminate almost all their symptoms. At the same time it can put off the point at which they have to begin taking insulin or perhaps completely avoid insulin treatment."

Dela was quoted as saying.

Insulin is a hormone produced by the pancreas， controlling sugar in the body and used against diabetes.

Dela said that to achieve the desired effect diabetics need only exercise to the point where they begin to work up a sweat， but that the activity has to be maintained since it wears off after five days without sufficient exercise.

Most diabetics realize that they have to watch their diet while remaining unaware of the importance of exercise， Dela added.

How could most elderly type II diabetics stop taking insulin? 查看材料

A.By taking more salt than usual.

B.By taking less salt than usual.

C.By doing brisk exercise for half an hour at least three times a week.

D.By going climbing， swimming or boxing every day.

A.Exercise only leads to modest weight loss without diet changes.

B.Exercise can help people lose as much weight as they expect.

C.Hoping to lose weight sometimes would be ruined due to bad habits.

D.People can lose extra weight fast in an appropriate way.

Exercise can benefit those who suffer from loneliness.

A．Y

B．N

C．NG

Which of the following is NOT true?

A．Muscle-building exercise results in weight-gaining,but that is not a problem to worry about.

B．Muscle helps one keep fit.

C．Improved muscle strength can lead to a higher quality of life.

D．Weight-training helps shape up you body.

Regular exercise can you against heart disease.

A. fight B. protect C. keep D. support

We’ve known for a long time a high—fat diet，obesity and lack of exercise can increase the risk of developing heart disease and type 2 diabetes，two conditions affecting millions of Americans．What we are finding out now is those same lifestyle. factors also play an important role in cancer． That’s the bad news．The good news is you can do something about your lifestyle. If we grew thin ner，exercised regularly，avoided diets rich in red meat and ate diets rich in fruits and vegetables．and stopped using tobacco，we would prevent 70 percent of aU cancers． The strongest evidence of the importance of lifestyle. in cancer is most common cancers arise at dramatically different rates in different parts of the globe Several cancers that are extremelv common in the United States——colon，prostate and breast cancer---are relatively rare in other parts of theworld，occurring only 1／10th or 1／20th as often．Equally striking，when people migrate from other parts of the world to the United States，with in a generation their cancer rates approach those of US whose families have lived in this country for a long time Even if people in other parts of the world stay put，but adopt a U．S．1ifestyle，their risk of cancer rise；as Japanese have embraced Western habits，their rates of colon，breast and prostate cancer have skyrocketed What is it about our lifestyle. that raises the risk of many types of cancer?The main culpritsseem to be the Western diet，obesity and physical inactivity．While we’ve known about the importance of tobacco and cancer for more than 50 years，we are just beginning to understand how diet，ahealthy body weight and regular exercise can protect US against cancer． A striking example of the profound influence of diet was reported last summer in The Journal of the American Medical Association．Doctors determined the eating habits of patients with colon cancer in the years following surgical removal of the cancer．Over the next five years，those who ate a traditional Western diet had a threefold greater likelihood of developing a recurrence of the disease than did those who ate a“prudent”diet rich in fruits and vegetables and including only small amounts of red meat．How had diet affected these patients?The surgery clearly had not removed all their colon cancer cells：prior to the surgery，some cells had already spread from the primary tumor．The West erR diet had somehow stimulated the growth of these small deposits of residual cancer cells． Obesity is the second most important factor in causing cancer in Western populations after to bacco．There is evidence that maintaining a healthy weight is protective against the disease A studyby the American Cancer Society in 2003 found the heaviest people，in comparison with the leanest，had a significantly increased risk of death from 1 0 different kinds of cancer in men，and 12 different kinds in women．The most extreme examples were liver cancer in men and uterine cancer in women．

According to paragraph 2，which of the following statements is true?__________

A．Different rates of common cancers in different regions result from different lifestyles．

B．The rate of several extremely common cancers in the U．S．is higher by 1／1 0 or 1／20．

C．People who migrate to the United States have high cancer rates after a generation．

D．If people out of the western world stay at home，their risk of cancer won’t rise

In the author's opinion，______.

A．developing countries should be responsible for environmental problems

B．overpopulation in the world is created by the developed countries

C．rich countries exercise worse influence on environment than poor countries

D．all countries should bring the population growth under control