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从培训内容上看，通过自学。可以掌握()。
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论述综合发展战略理论的主要观点并加以评价。
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Shopping habits in the United States have changed greatly in the last quarter of the 20th century. （1） in the 1900s most American towns and cities had a Main Street. Main Street was always in the heart of a town. This street was （2） on both sides with many （3） businesses. Here, shoppers walked into stores to look at all sorts of merchandise: clothing, furniture, hardware, groceries. （4）,some shops offered （5） .These shops included drugstores, restaurants, shoe-repair stores, and barber or hairdressing shops. （6） in the 1950s, a change began to （7） .Too many automobiles had crowded into Main Street （8） too few parking places were （9） shoppers. Because the streets were crowded, merchants began to look with interest at the open spaces （10） the city limits. Open space is what their car-driving customers needed. And open space is what they got （11） the first shopping centre was built. Shopping centres, or rather malls, （12） as a collection of small new stores （13） crowded city centres. 14 by hundreds of free parking space, customers were drawn away from （14） areas to outlying malls. And the growing （16） of shopping centres led （17） to the building of bigger and betterstocked stores. （18） the late 1970s,many shopping malls had almost developed into small cities themselves. In addition to providing the （19） of one stop shopping, malls were transformed into landscaped parks, （20）benches, fountains, and outdoor entertainment. 请在17处填上正确答案（）
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地震波的传播速度仅与岩石的密度有关.
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土壤团粒结构的恢复措施只有增施结构;此题为判断题(对，错)。
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会议的中心文件是()。A.开幕词B.大会报告C.会议纪要D.闭幕词
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“历史上大凡激烈变革和动荡的时代，总不免出现两种倾向：一种是要砸烂一切旧传统的革命倾向，一种是要维护旧传统的保守倾向。”下列事件具有第一种倾向的是（）
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气压过低，胎面接地面积（），滑移量增加，加剧磨损，特别是胎肩磨损加剧，双胎中一胎气压过低会使另一胎超载损坏。
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“中气不足，…，肠为之苦鸣”一说最早见于（）。
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在不增减运力的情况下，按实际客流情况，及时调整行车间距，增加或减少分组时间内的行车频率，这种公共交通运营调度方法是（）。