题目内容
There is a great irony of 21st-century global health: While many hundreds of millions of people lack adequate food as a result of economic inequities, political corruption, or warfare, many hundreds of millions more are overweight to the point of increased risk for diet-related chronic diseases. Obesity is a worldwide phenomenon, affecting children as well as adults and forcing all but the poorest countries to divert scarce resources away from food security to take care of people with preventable heart disease and diabetes. To reverse the obesity epidemic, we must address the fundamental causes. Overweight comes from consuming more food energy than is expended in activity. The cause of this imbalance also is ironic: improved prosperity. People use extra income to eat more and be less physically active. Market economies encourage this. They make people with expendable income into consumers of aggressively marketed foods that are high in energy but low in nutritional value, and of cars, televisions set. And computers that promote sedentary behavior. Gaining weight are good business. Food is particularly big business because everyone eats. Moreover, food is so overproduced that many countries, especially the rich ones that far more than they need, another irony, than the United States, to take an extreme example, most adults—-of all ages, incomes, educational levels, and census categories—are overweight. The U. S. food supply provides 3800 kilocalories per person per day, nearly twice as much as required by many a-dults. Overabundant food forces companies to compete for sales through advertising, health claims, new products, larger portions, and campaigns directed toward children. Food marketing promotes weight gain. Indeed, it is difficult to think of any major industry that might benefit if people ate! Less food; certainly not the agriculture, food product, grocery, restaurant, diet or drug industries. All flourish when people eat more. And all employ armies of Lobbyists to discourage governments from doing anything to inhibit overeating. As we can learn from the passage, the second irony refers to______.
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Women find a masculine face—with a large jaw and a prominent brow—-more attractive when they are most likely to attractive, according to a study published in the June 24 NATURE. Before, during, and use after menstruation, however, they seem to be drawn to less angular, more "feminine" male faces, the researchers report. " Other studies of female preference, mainly for odors, show changes across the menstrual cycle ," says lead author Ian Penton-Voak of the University of St. Andrews in Scotland. " We thought it would be interesting to look at visual preferences and see if they changed also". The researchers showed 39 Japanese women composite male faces that emphasized masculine or feminine facial features to differing degrees. The women preferred images with more masculine features when they were in the fertile phase of their menses but favored more feminine features during their less fertile phase. The type of face women find attractive also seems to depend on the kind of relationship they wish to pursue, according to another experiment. The cyclic preference for muscular faces was evident among 23 British women asked to choose the most attractive face for a short-term relationship, Penton-Voak says. The 26 women asked to choose an attractive face for a long-term relationship, however, preferred the more feminine features throughout their menstrual cycle. Another 22 women who were using oral contraceptives did not show monthly changes in the faces they preferred even for short-term relationships, indicating that hormones might play a role in determining attractiveness, Penton-Voak says. Men whose faces have some feminine softness are perceived as " kinder" men who may make better husbands and partners, he adds, while macho features may be associated with higher testosterone(睾丸素)levels and good genes. He cautions, however, that research hasn"t yet shown a link between a woman" s preferences in such tests and her actual behavior. The researchers made a study on______.
There is a great irony of 21st-century global health: While many hundreds of millions of people lack adequate food as a result of economic inequities, political corruption, or warfare, many hundreds of millions more are overweight to the point of increased risk for diet-related chronic diseases. Obesity is a worldwide phenomenon, affecting children as well as adults and forcing all but the poorest countries to divert scarce resources away from food security to take care of people with preventable heart disease and diabetes. To reverse the obesity epidemic, we must address the fundamental causes. Overweight comes from consuming more food energy than is expended in activity. The cause of this imbalance also is ironic: improved prosperity. People use extra income to eat more and be less physically active. Market economies encourage this. They make people with expendable income into consumers of aggressively marketed foods that are high in energy but low in nutritional value, and of cars, televisions set. And computers that promote sedentary behavior. Gaining weight are good business. Food is particularly big business because everyone eats. Moreover, food is so overproduced that many countries, especially the rich ones that far more than they need, another irony, than the United States, to take an extreme example, most adults—-of all ages, incomes, educational levels, and census categories—are overweight. The U. S. food supply provides 3800 kilocalories per person per day, nearly twice as much as required by many a-dults. Overabundant food forces companies to compete for sales through advertising, health claims, new products, larger portions, and campaigns directed toward children. Food marketing promotes weight gain. Indeed, it is difficult to think of any major industry that might benefit if people ate! Less food; certainly not the agriculture, food product, grocery, restaurant, diet or drug industries. All flourish when people eat more. And all employ armies of Lobbyists to discourage governments from doing anything to inhibit overeating. Which of the following can be excluded as we can understand based on the passage
Smoking causes wrinkles by upsetting the body" s mechanism for renewing skin, say scientists in Japan. Dermatologists say the finding confirms the long-held view that smoking ages skin prematurely. Skin stays healthy and young-looking because of a fine balance between two processes that are constantly at work. The first breaks-down old skin while the second makes new skin. The body breaks down the old skin with enzymes called matrix metalloproteinases, or MMPs, They chop up the fibers that form collagen(胶原质)—the connective tissue that makes up around 80 percent of normal skin. Akimichi Morita and his colleagues at Nagoya City University Medical School suspected that smoking disrupted the body" s natural process of breaking down old skin and renewing it. To test their idea, they first made a solution of cigarette smoke by pumping smoke through a saline(盐的)solution. Smoke was sucked from cigarettes for two seconds every minute. Tiny drops of this smoke solution were added to dishes of human fibroblasts, the skin cells that produce collagen. After a day in contact with smoke solution, the researchers tested the skin cells, to see how much collagen-degrading MMP they were making. Morita found that cells exposed to cigarette smoke had produced far more MMP than normal skin cells. Morita also tested the skin cells to see how much new collagen they were producing. He found that the smoke caused a drop in the production of fresh collagen by up to 40 percent. He says that this combined effect of degrading collagen more rapidly and producing less new collagen is probably what causes premature skin ageing in smokers, in both cases, the more concentrated the smoke solution the greater the effect on collagen. " This suggests the amount of collagen is important for skin ageing," he says. "It looks like less collagen means more wrinkle formation". Morita doesn" t know if this is the whole story of why smokers have more wrinkles. But he plans to confirm his findings by testing skin samples from smokers and non-smokers of various ages to see if the smoking has the same effect on collagen. "So far we" ve only done this in the lab. " he says. " We don"t know exactly what happens in the body yet that might take some time. " Other dermatologists are impressed by file work. "This is fascinating," says Lawrence Parish. Director of the Centre for International Dermatology at Thomas Jefferson University Hospital in Philadelphia. This confirms scientifically what we"ve long expected, he says. "Tobacco smoke is injurious to skin. " For the Japanese scientists, to test their idea is______.
Are some people born clever and others born stupid Or is intelligence developed by our environment and our experiences Strangely【C1】______, the answer to both these questions is yes. To some extent our intelligence is given us at birth, and no amount of special education can make a genius【C2】______a child born with low intelligence. On the other hand, a child who lives in boring environment will develop his intelligence less than the one who lives in rich and varied surroundings. Thus the【C3】______of a person" s intelligence are fixed at birth, but whether or not he reaches those limits will depend on his【C4】______This view, not held by most experts, can be supported in a number of ways. It is easy to show that intelligence is to some extent【C5】______we are born with. The closer the blood relationship between two people, the closer they are likely to be in intelligence. Thus if we take two unrelated people【C6】______, it is likely that their degrees of intelligence will be completely different. If on the other hand we take two identical twins they will likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have【C7】______intelligence and this clearly suggests that intelligence depends on birth. 【C8】______now that we take identical twins and put them in different environments. We might send one, for example to a university and the other to a factory where the work is boring. We would soon find differences in intelligence developing, and this indicates that environment【C9】______birth plays a part. This conclusion is also suggested by the【C10】______that people who live in close contact with each other,but who are not related at all, are likely to have similar degrees of intelligence. 【C3】
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