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example. Many people are under the impressions that advanced mathematical study in university is so theoretical that it does not have any practical value. However, the truth is that, ours is an age in which all areas of science are permeated more and more by methods and approaches derived from theoretical knowledge in mathematics. Even marketing, once believed to be just an art of persuading people to buy, is now becoming a scientific subject based on statistical studies of market data, which requires profound mathematical knowledge. 2. Practical trainings are based on theoretical knowledge. / Practical trainings and theoretical studies are interrelated. a) Some professions require that people have solid understanding in theoretical knowledge before going into practice in those professions. For example, to be a qualified doctor, someone will have to first learn theoretical knowledge at a medical school for a few years in various related subjects including medical science, humanities and social sciences. Then at the final years at the school, he or she will be given chance to practice as an intern in a hospital to gain practical experience. Only with a combined knowledge both in theory and in practical skills can a person truly become a successful doctor. The same goes with a number of other professions such as lawyers, psychiatrists etc. 3.We have specialized schools such as polytechnic schools and vocational schools etc. which can provide practical trainings, for example schools specialized in teaching cooking skills. Therefore universities should focus more on theoretical knowledge. 议论文写作素材－old people VS. young people Some people believe that in order to give opportunities to new generations companies should encourage high level employees who are older than 55 to retire. Do you agree or disagree? Why? lOld people should retire because they have worked hard for so many years and should take a rest. After retirement, they can live on their pension and can enjoy their retirement life traveling or taking care of their grandchildren. advantages/strengths disadvantages/weaknesses young people energetic and active creative bold, ready to take risks fast learning open-minded, ready to try new things equipped with the latest concept in business and management inexperienced not practical sometimes having ambitious plans but not down-to-earth approaches not loyal, change work frequently old people experienced thoughtful insightful visionary knowledgeable well-established social network loyalty physically not so fit stiff-minded traditional lOld people should retire because it helps to solve the unemployment problem of the society by allowing more young people to join the workforce. 议论文写作素材－culture and languageWhat are the reasons for losing a variety of languages and culture? Culture is the learned and shared behavior of a community of interacting human beings. And languages are the cornerstones of a culture, defining who we are as a people. Just as the world is becoming less biologically rich, it is also becoming less culturally and linguistically diverse. There are a variety of reasons for the loss of cultures and languages. 1. Loss of Culture a) Technology Technology has now created the possibility of a global culture. With the i