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Boys miss more school hours each year due to dental-related illness.（）
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小鸡在出生后很短的一段时间内会追逐自己的同类，这种无需强化、在一定时期内很容易形成的反映，称为（）。
第三篇Youth Emancipation in SpainThe Spanish Government is so worried about the number of young adults still living with their parents that it has decided to help them leave the nest.Around 55 percent of people aged 18-34 in Spain still sleep in their parents’ home, says the latest report from the country’s state-run Institute of Youth.To coax(劝诱) young people from their homes, the Institute started a "Youth Emancipation(解放)" programme this month. The programme offers guidance in finding rooms and jobs.Economists blame young people’s family dependence on the precarious(不稳定的) labour market and increasing housing prices. Housing prices have risen 17 percent a year since 2000.Cultural reasons also contribute to the problem, say sociologists(社会学家). Family ties in south Europe—Italy, Portugal and Greece—are stronger than those in middle and north Europe, said Spanish sociologist Almudena Moreno Minguez in her report "The Late Emancipation of Spanish Youth: Key for Understanding"."In general, young people in Spain firmly believe in the family as the main body around which their private life is organized,’ said Minguez.In Spain—especially in the countryside, it is not uncommon to find entire groups of aunts, uncles, cousins, nieces and nephews(外甥/侄子) all living on the same street. They regularly get together for Sunday dinner.Parents’ tolerance is another factor. Spanish parents accept late-night partying and are wary of setting bedtime rules."A child can arrive home at whatever time he wants. If parents complain he’ll put up a fight and call the father a fascist," said Jose Antonio G6mez Yanez, a sociologist at Carlos III University in Madrid.Mothers’ willingness to do children’s household chores(家务) worsens the problem. Dionisio Masso, a 60-year-old in Madrid, has three children in their 20s. The eldest, 28, has a girlfriend and a job. But life with mum is good."His mum does the wash and cooks for him; in the end, he lives well," Masso said. The "Youth Emancipation" programme aims at helping young people（）
简述制造费用的分配方法及其适用范围。
教育心理学的开山鼻祖，有“教育心理学之父”之称的美国心理学家是（）。
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