单选题The ink has faded with time and so parts of the letter were______. A. illegible B. indelible C. illegitimate D. inscrutable

单选题There was to be more use, where necessary and if carefully monitored, of ______ capital re- sources drawn from international institutions such as the World Bank. A. complementary B. compulsory C. supplementary D. compensatory

单选题The concept of personal choice in relation to health behaviors is an important one. An estimated 90 percent of all illnesses may be preventable if individuals would make sound personal health choices based upon current medical knowledge. We all enjoy our freedom of choice and do not like to see it restricted when it is within the legal and moral boundaries of society. The structure of American society allows us to make almost all our own personal decisions that may concern our health. If we so desire, we can smoke, drink excessively, refuse to wear seat belts, eat whatever foods we want, and live a completely sedentary life-style without any exercise. The freedom to make such personal decisions is a fundamental aspect of our society, although the wisdom of these decisions can be questioned. Personal choices relative to health often cause a difficulty. As one example, a teenager may know the facts relative to smoking cigarettes and health but may be pressured by friends into believing it is the socially accepted thing to do. A multitude of factors, both inherited and environmental, influence the development of health-related behaviors, and it is beyond the scope of this text to discuss all these factors as they may affect any given individual. However, the decision to adopt a particular health-related behavior is usually one of personal choice. There are healthy choices and there are unhealthy choices. In discussing the morals of personal choice, Fries and Crapo draw a comparison. They suggest that to knowingly give oneself over to a behavior that has a statistical probability of shortening life is similar to attempting suicide. Thus, for those individuals who are interested in preserving both the quality and quantity of life, personal health choices should reflect those behaviors that are associated with a statistical probability of increased vitality and longevity.

单选题Ice can be used to keep food from Uspoiling/U.

单选题How does codification of the laws affect governmental agents?

单选题According to Henry Louis "Skip" Gates Jr. himself, giving advice to President Gore is ______.

单选题Gordon Shaw the physicist, 66, and colleagues have discovered what"s known as the "Mozart effect", the ability of a Mozart sonata, under the fight circumstances, to improve the listener"s mathematical and reasoning abilities. But the findings are controversial and have launched all kinds of crank notions about using music to make kids smarter. The hype, he warns, has gotten out of hand. But first, the essence: is there something abut the brain cells work to explain the effect? In 1978 the neuroscientist Vernon Mountacastle devised a model of the neural structure of the brain"s gray matter. Looking like a thick band of colorful bead work, it represents the firing patterns of groups of neurons. Building on Mountcastle, Shaw and his team constructed a model of their own. On a lark, Xiaodan Leng, who was Shaw"s colleague at the time, used a synthesizer to translate these patterns into music. What came out of the speakers wasn"t exactly toe-tapping, but it was music. Shaw and Leng inferred that music and brain-wave activity are built on the same sort of pattern. "Gordon is a contrarian in his thinking," says his longtime friend, Nobel Prize-Winning Standford Physicist Martin Perl. "That"s important. In new areas of science, such as brain research, nobody knows how to do it." What do neuroscientists and psychologists think of Shaw"s findings? They haven"t condemned it, but neither have they confirmed it. Maybe you have to take them with a grain of salt, but the experiments by Shaw and his colleagues are intriguing. In March a team led by Shaw announced that young children who had listened to the Mozart sonata and studied the piano over a period of months improved their scores by 27% on a test of ratios and proportions. The control group against which they were measured received compatible enrichment course—minus the music. The Mozart-trained kids are now doing math three grade levels ahead of their peers, Shaw claims. Proof of all this, of course, is necessarily elusive because it can be difficult to do a double blind experiment of educational techniques. In a double blind trial of an arthritis drug, neither the study subjects nor the experts evaluating them know which ones got the best treatment and which a dummy pill. How do you keep the participants from knowing it"s Mozart on the CD?

单选题In the search for solution to seemingly overwhelming problems, it became increasingly ______ to include radical, even revolutionary ideas.

单选题The conflict between romantic ______and harsh reality has been the theme of many great novels

单选题I'd ______ his reputation with other farmers and business people in the community, and then make a decision about whether or not to approve a loan.

单选题Stephen Schneider, a climatologist at Stanford, notes that unlike greenhouse gases, which ______ rapidly around the globe, the sulfate droplets tend to concentrate over industrialized regions. A. unify B. fragment C. disperse D. shatter

单选题At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has become to work out international agreements relating to the environment because of economic concerns unique to each country. It is no longer (21) to try to forbid certain activities or to reduce (22) of certain substances. The global challenges of the inter-link between the environment and development increasingly (23) us to the core of the economic life of states. During the late 1980s we were able, through international agreements, to make deep (24) in emissions (25) the ozone layer. These reductions were made possible (26) the harmful substances could be replaced (27) negative effects on employment and the economies of states. Although the threat of global warming has been known to world for decades, we know that the effects of measures, (28) harsh measures taken in some countries, would be nullified if (29) countries do not control their emissions. Important and populous low- or medium-income countries are not (30) willing to undertake legal commitments about their energy uses. We must, (31) find a solution to the threat of global warming early in the 21st century. Such a (32) would require a degree of shared vision and common responsibilities new to humanity. Success lies in the force of imaginations, in imagining what (33) if we failed to act. Although many living in cold regions would welcome the global-warming effect of a warmer summer, (34) would cheer arrival of the (35) tropical diseases, especially where there has been none.

单选题The ratio of the work done by machine______the work done on it is called the efficiency of the machine.

单选题In ______ , the whole tangled saga is a classic case of serious allegations falling through the cracks between federal, state and local jurisdictions and between state lines.

单选题He is honest. His actions are always ______ his words.

单选题Inthatcountry,studentswillbe_____admittancetotheirclassroomiftheyarenotproperlydressed.