The findings come ___36___ a study of nearly 1,000 US people that looked at diet, calorie intake and body mass index (BMI) - a measure of obesity.___37___ is found that those who ate chocolate a few times a week were, on ___38___, slimmer than those ___39___ ate it occasionally. Even though chocolate is loaded with calories, it contains ingredients(材料)that may favour weight loss ___40___ than fat synthesis, scientists believe.___41___ boosting calorie intake, regular chocolate consumption was related to lower BMI in the study, ___42___ is published in Archives of Internal Medicine. The link remained even when other factors, like how ___43___ exercise individuals did, were taken into ___44___.And it appears it is how often you eat chocolate that is important, rather than how much of it you eat. The ___45___ found no link with quantity consumed.
___46___ to the researchers, there is only one chance in a hundred that their findings could be explained by chance alone. Lead author Dr Beatrice Golomb, from the University of California at San Diego, said: "Our findings appear to add to a body of information suggesting that the composition of calories, not just the number of them, matters for determining their ultimate impact on weight."This is not the first time scientists ___47___ that chocolate may be healthy for us. Other studies have claimed chocolate may be good for the heart. Consumption of certain types of chocolate has been linked to some favourable changes in blood pressure, insulin(胰岛素)sensitivity and cholesterol(胆固醇)level. And chocolate, ___48___ dark chocolate, does contain antioxidants(抗氧化剂)which can help to mop up harmful free radicals - unstable chemicals that can damage our cells.
Dr Golomb and her team believe that antioxidant compounds, called catechins(儿茶素), can improve lean muscle mass and reduce weight ___49___ studies in rodents would suggest this might be so. Mice ___50___ for 15 days with epicatechin (present in dark chocolate) had improved exercise performance and observable changes to their muscle composition.They say clinical trials are now needed in humans to see ___51___ this is the case.
But before you reach ___52___ a chocolate bar, there are still lots of unanswered questions. And in the absence of conclusive evidence, experts advise caution.While there's no harm in allowing yourself a treat like ___53___ now and again, eating too much might be harmful because it often ___54___ a lot of sugar and fat too.And if you are looking to change your diet, you are ___55___ to benefit most from eating more fresh fruits and vegetables.
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The inhalation (吸入) of asbestos particles is associated with a number of lung diseases, such as asbestosis and ___50___ cancer.
Asbestosis is caused by the entry of asbestos particles into the wall of the alveoli, causing scarring which limits the functioning of the lungs. The lung ___51___ its elasticity and may change shape. The initial symptoms of asbestosis are a tightness in the chest and breathlessness. In its ___52___ stages, sufferers develop the barrel-shaped chests associated with emphysema, cyanosis, (where the skin takes a bluish ___53___ ) and club fingers.
Lung cancer, the generic ___54___ for malignant tumors(肿瘤)of the alveoli and bronchial tubes, has been shown to be directly ___55___ to the inhalation of asbestos particles. As in the case of asbestosis, there is generally a period of inactiveness which may ___56___ from 25 to 30 years after initial exposure, despite the ___57___of further exposure. Research suggests that there is a direct correlation between the degree of exposure to asbestos ___58___the incidence of lung cancer. Where exposure occurs, the level of risk is further ___59___ by cigarette smoking. Asbestos workers who smoke cigarettes have a 90% greater risk of catching lung cancer than workers who do not ___60___.
Exposure to blue asbestos has been shown to producemesothelioma, a rare cancer of the outer lining of the lung or pleura. In a normal population the incidence of mesothelioma is extremely ___61___. Where epidemiological surveys have revealed a higher incidence of the disease, it is almost always related to ___62___ exposure.
___63___ changes in lung tissue caused by exposure to asbestos are pleural plaques and effusions. The former refer to a thickening of the lining of the chest wall, ___64___ the latter consists of a collection of fluid in the chest region outside the lungs. Pleural plaques commonly remain undiagnosed and generally have no detrimental effect on health.
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Nancy Volk operated a sidewalk cafe in Anoka, Minnesota to support her family.
Dan Heins, one of the cafe’s regular customers, had a 36 : kidney dialysis(肾透析) from 6 to 10 a.m on Tuesdays, Thursdays, and Saturdays, after 37 at the cafe. The 56-year-old owner of the small cafe, Nancy 38 that Heins' diabetes(糖尿病)was 39 for his kidney failure and the cut-off of his leg. And Dan knew that Nancy, a single mother with three daughters, worked two other jobs to 40 the cafe open and meet her housing loans.
One morning as he ordered his breakfast, he 41 he would be on kidney dialysis the rest of his life if he didn't receive a(n) 42 . Nancy didn't hesitate, simply saying “I’ll donate”. A normal 43 volunteered to give him an organ? It seemed 44 to Dan, and Nancy had to spend a few weeks 45 him she was serious. The day before Thanksgiving in 2009, the results of the medical tests came in: She was a 46 .
While they were 47 the transplant, Dan’s other leg was cut off and Nancy’s financial 48 grew from bad to worse.
Nancy decided to close the cafe last September much 49 she loved it. At the same time, her home was going into 50 . Dan's insurance would 51 her surgery costs, but she was worried too much that she wouldn't be able to work the part-time jobs for six weeks.
Steve Ohlsen, another customer of the cafe, 52 a donation box near the register. In less than one month, people gave Nancy several thousand dollars—enough to ensure 53 on her home while she recovered.
Nancy and Dan had their 54 in September. Four months later,Dan is 55 dialysis, and Nancy has sent thank-you notes to her supporters.
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完形填空:阅读下面短文,掌握其大意,然后从各题所给的四个选项中选出一个最佳答案。(共20小题,每小题1.5分)
In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be 46 . Today things are 47 , the world has
become too 48 . We are using up our natural resources too quickly, and at the same time we are 49 our environment with dangerous chemicals. If we continue to do this, human life on the earth 50 survive.
Everyone 51 today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing 52 , more and more fish are caught. We know that if too many trees are cut down, 53 will disappear and nothing will grow on the land. Yet, we 54 to use bigger and more powerful machines to 55 more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. 56 , in most countries wastes are 57 put into rivers or into the sea, and there are 58 laws to stop this. We know, too, that if the 59 of the world continues to rise at the present rate, in a few years there will not be enough 60 . What can we do to solve these problems ?
If we eat more vegetables and less 61 , there will be more food available for everyone. Land that is used to grow crops 62 five times more people than land where animals are kept. Our natural resources will 63 longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth 64 .
Finally, if we educate people to think about the problems, we shall have a better and clearer 65 in the future.
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