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原文“大病瘥后，从腰以下有水气者”，用下列何方治疗：（）
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急性心肌梗死合并三度房室传导阻滞最好采用（）
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磁力线、电流和作用力三者的方向是（）。
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用于婴儿及儿童的化妆品，其微生物学卫生标准要求细菌总数不大于（）
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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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美国独立战争之所以得到法、荷军事援助的原因，不包括：（）
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钢在加热时，判断过烧现象的依据是（）。
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描述处理逻辑的工具有决策树、决策表和（）。
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男女儿童在认知方面有哪些差异？
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请从概念、来源以及应用等方面区分胚胎干细胞和成体干细胞。