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价格变动影响企业的生产和经营。面对商品降价，企业必须努力提高劳动生产率。这样做的经济意义是（） ①降低社会必要劳动时间，获得竞争优势 ②降低个别劳动时间，获得竞争优势 ③提高单位商品的价值量，以质取胜 ④提供产品降价空间，增加销售
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简述学习迁移的基本理论。
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以下哪类土的工程性质较差，不可直接采用作为路基填土，必须换土或处理()
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战略管理的作用主要体现在（）
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急性间质性肾炎肾脏病理免疫荧光通常为阴性，但偶尔可以见到以下沉积物（）
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原发性肺结核基本病变表现为（）
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Marriage Advertisements in India Every Sunday morning millions of Indians settle down with a cup of tea and special weekend issues of their newspapers, just as Americans do. But here, with the marriage season approaching, many of them quickly to a Sunday feature that is particularly Indian-the-columns of marriage advertisements in which young people look for husbands and wives. This is relatively modern change in the age-old custom of the arranged marriage. The thousands of advertisements published each week increasingly reflect social changes that coming to this traditional society. For example, although women are still described in terms of appearance, or skill in "the wifely arts", information about her earning power is entering more and more of the advertisements. This reflects the arrival in India of the working wife. Divorce, which used to be almost unheard of in India, is sometimes now mentioned in the advertisements as in the case of a woman whose advertisement in New Delhi newspaper explained that had been "the innocent party" when her marriage broke up. Because the custom of the dowry (marriage payment) is now illegal, some advertisements say "no dowry" or "simple marriage", which means the same thing. However, the fathers of many bridegrooms still require it. In a land where light skin is often regarded as socially preferable, many also require that a woman have a "wheat-color" complexion or that a man be "tall, fair and handsome". Advertisements are placed and eagerly read by a wide range of people in the upper classes, mostly in cities. Many of them receive dozens of answers."There's nothing embarrassing about it," explained a Calcutta businessman advertising a son-in-law. "It's just another way of broadening the contacts and increasing the possibility of doing the contacts and increasing the possibilities of doing the best one for one's daughter." Because of high unemployment and a generally poor standard of living here, one of the best attractions a marriage advertisement can offer is a permit to live abroad, especially in Canada or the United States. A person who has one can get what he wants. One recent Sunday in Madras, for example, a Punjabi engineer living in San Francisco advertised for a "beautiful slim bride with lovely features knowing music and dance". And a man whose advertisement said that he held an American immigration permit was able to say, only girls from rich, well-connected families need apply. In India people with light skin and good feature are preferable.（）
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不属于影响心理健康的外部因素是
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人民调解员的担任条件？
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属于根菜类的蔬菜品种是（）。