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100增加1/10后，又减少了1/10，结果是（）
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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11处填上正确答案（）
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柴油发电机电压波动原因（）。
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李清照《声声慢》体现了词人怎样的处境和心情？
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柴油机自然循环式冷却系统的特点是结构简单，但冷却能力不强，一般用于（）的柴油机上。
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为预防甲型流感的主要措施是（）
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电气控制设计的一般程序有哪些？
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在催化重整反应中为提高汽油的辛烷值，不希望发生的反应是（）
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哮喘发病机制目前主要包括__________、__________和__________。
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按网络的作用范围分类，可分为：集中式网络、分散式网络、分布式网络。()