题目内容
Three factors contribute to the miraculous spread of English (31) an international language: English usage in science, technology and commerce; the ability to (32) vocabulary from other languages; and the acceptability of various English dialects. In science, English (33) German after World War II. With this technical and scientific dominance (34) the beginning of overall dominance by the language, (35) in Europe and then globally. Today, the information (36) has replaced the industrial age and has (37) time and distance. This is transforming world economies from industrial production to information-based goods and services. (38) geography and borders, the information revolution is reflecting our world. In less than twenty years, information processing, (39) limited to the printed work, has given way to computers and the Internet. Computer-aided communication is closing the gap between spoken and written English. It encourages more (40) conversational language and a tolerance for diversity and individual style. English, (41) many languages, uses a phonetic alphabet and fairly basic grammar. But most importantly, it has a large and extensive vocabulary, (42) about 80% is foreign. It has borrowed and continues to borrow words from Spanish and French, Hebrew and Arabic, Hindi-Urdu and Bengali, Malay and Chinese, (43) from languages from West Africa and Polynesia. This language characteristic makes it unique (44) history. Finally, (45) English language central authority guards the standards of the language; therefore, many (46) have developed: American, British, Canadian, Indian, and Australian, (47) a few. There is no standard pronunciation. But within this diversity is a (48) of grammar and one set of core vocabulary. (49) , each country that speaks the language can introduce (50) of its own culture into the usage and vocabulary.
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设函数f(x)(x≥0)连续可导，且f(0)=1．又已知曲线y=f(x)、x轴、y轴及过点(x，0)且垂直于x轴的直线所围成的图形的面积与曲线y=f(x)在[0，x]上的一段弧长相等，求f(x)．
The availability to occupations depends also on shifts in the national economy and increasingly on economic developments worldwide. There are several ways to measure these effects, including the rate of unemployment, the international balance of trade, and the productivity of American workers. The unemployment rate is a standard measure of joblessness in a community, state, or nation as a whole. Computed by standards set by the United States Department of Labor, the measure is made by taking a random sample of households in an area. It is an estimate of the percentage of people who are not working but are looking for work. The unemployment rate has been said to under-represent the actual unemployed because those who have stopped looking for work are not counted. It is a comparable statistic from state to state, however, because it is computed in the same manner. Traditionally an unemployment rate of 4 percent is considered full employment because people quit, change jobs, or are fired regardless of the relative health of the economy. In contrast the national unemployment rate reached as high as 25 percent during the Great Depression of the 1930s. When unemployment is low, people work and receive payment. They in turn buy goods and services that keep the work force employed and growing. This is an expanding economy. When unemployment is high, there is less money to purchase goods and services because fewer people are working. Fewer goods are sold, and businesses lose money and reduce the number of workers. This is a contracting economy. The United States government has many safeguards for the economy. It cannot, however, prevent dislocations due to technological change. A manufacturing process can suddenly become obsolete when a new technology is developed. Economic hardship may occur in a region even though the same goods are still being produced. An example is the industrial Midwest in the early 1980s. Increasingly manufacturers, both in the United States and abroad, were using foreign steel to make products. More finished products were also being imported, replacing American-made goods. Many workers were laid off, causing disruption of normal economic activities. Meanwhile high-tech manufacturing processes were developing elsewhere. California’s so-called Silicon Valley, south of San Francisco, became famous for its computer-related goods and computer-assisted design amid manufacturing processes. This was of little benefit to workers displaced by the obsolescence of traditional manufacturing. Because of a lack of transferable skills, many could not make the change. Some workers were laid-off indefinitely, forcing them to accept jobs that paid less or imposing upon them essentially permanent unemployment. Leaders of American business and education are sensitive to these issues. Increasingly concerned with the productivity of the individual worker, business people and educators have formed alliances to save local jobs by improving the work force and by redesigning the curricula of schools and training centers to encourage the development of useful skills. Business people and educators in the United States
Questions 21 to 22 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news. How many overseas visitors traveled to New York City in 20077
The availability to occupations depends also on shifts in the national economy and increasingly on economic developments worldwide. There are several ways to measure these effects, including the rate of unemployment, the international balance of trade, and the productivity of American workers. The unemployment rate is a standard measure of joblessness in a community, state, or nation as a whole. Computed by standards set by the United States Department of Labor, the measure is made by taking a random sample of households in an area. It is an estimate of the percentage of people who are not working but are looking for work. The unemployment rate has been said to under-represent the actual unemployed because those who have stopped looking for work are not counted. It is a comparable statistic from state to state, however, because it is computed in the same manner. Traditionally an unemployment rate of 4 percent is considered full employment because people quit, change jobs, or are fired regardless of the relative health of the economy. In contrast the national unemployment rate reached as high as 25 percent during the Great Depression of the 1930s. When unemployment is low, people work and receive payment. They in turn buy goods and services that keep the work force employed and growing. This is an expanding economy. When unemployment is high, there is less money to purchase goods and services because fewer people are working. Fewer goods are sold, and businesses lose money and reduce the number of workers. This is a contracting economy. The United States government has many safeguards for the economy. It cannot, however, prevent dislocations due to technological change. A manufacturing process can suddenly become obsolete when a new technology is developed. Economic hardship may occur in a region even though the same goods are still being produced. An example is the industrial Midwest in the early 1980s. Increasingly manufacturers, both in the United States and abroad, were using foreign steel to make products. More finished products were also being imported, replacing American-made goods. Many workers were laid off, causing disruption of normal economic activities. Meanwhile high-tech manufacturing processes were developing elsewhere. California’s so-called Silicon Valley, south of San Francisco, became famous for its computer-related goods and computer-assisted design amid manufacturing processes. This was of little benefit to workers displaced by the obsolescence of traditional manufacturing. Because of a lack of transferable skills, many could not make the change. Some workers were laid-off indefinitely, forcing them to accept jobs that paid less or imposing upon them essentially permanent unemployment. Leaders of American business and education are sensitive to these issues. Increasingly concerned with the productivity of the individual worker, business people and educators have formed alliances to save local jobs by improving the work force and by redesigning the curricula of schools and training centers to encourage the development of useful skills. Which of the following can be used as the best title of this passage
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