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根端囊肿多发生于后牙。
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关于暗室清洁的叙述，错误的是（）
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非肉芽肿性前葡萄膜炎可出现（）
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以下关于Access表的叙述中，正确的是()。
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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17处填上正确答案（）
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建筑钢材中，随着（）含量增加，钢材的强度、硬度提高，塑性和韧性显著下降。
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下列哪项是实验室产生气溶胶的主要原因（）。
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句子“既然有人找他，他一定很高兴。”属于（）。
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亚当．斯密在1776年发表的《国富论》中写道：“中国一向是世界上最富的国家，就是说，土地最肥沃，耕作最精细，人民最多而且最勤勉的国家。然而，许久以来，它似乎就停滞于静止状态了。”下列对“停滞于静止状态”的理解，正确的是（）。①人口多，消耗大，影响社会财富的积累②经济政策不合时宜③土地私有制的长期存在④作者的结论是基于横向比较研究
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在更换燃气表时应关闭（）进行更换。