已知在全部30人中随机抽取1人,抽到肥胖的学生的概率为4/15 是否有99．5％的把握认为肥胖与常喝碳酸饮料有关？说明你的理由
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《普速旅客列车入夜服务作业指导书》规定：卧车乘务员认真核对铺位，保证旅客按票面规定铺位休息，无越席和轮流使用卧铺的行为。
根据领导行为四分图理论，对于成熟的主管护师应采用的领导行为是：（）
为什么说当代国际秩序对战后世界经济与政治发展的影响具有双重性？
预算定额材料费=∑（材料消耗量×材料原价）
（2012）关于分层总和法计算沉降的基本假定，下列说法正确的是：（）
文献检索的方法主要有人工文献检索法、（）文献检索法、参考文献查找法和综合查找法。
下列关于持有期货公司股权的表述，正确的有（）。
园路竖曲线
请阅读Passage 2,完成第 26~30小题。Passage 2In spite of "endless talk of difference", American society is an amazing machine for homogenizing people. There is "the democratizing uniformity of dress and discourse, and the casualness and absence of deference" characteristic of popular culture. People are absorbed into "a culture of consumption" launched by the 19th-century department stores that offered "vast arrays of goods in an elegant atmosphere. Instead of intimate shops catering to a knowledgeable elite" these were stores"anyone could enter, regardless of class or background. Tlus turned shopping into a public and democratic act." The mass media, advertising and sports are other forces for homogenization.Immigrants are quickly fitting into this common culture, which may not be altogether elevating but is hardly poisonous. Writing for the National Immigration Forum, Gregory Rodriguez reports that today's immigration is neither at unprecedented levels nor resistant to assimilation. In 1998 immigrants were 9.8 percent of population; in 1900, 13.6 percent. In the10 years prior to 1990, 3.1 immigrants arrived for every l, 000 residents; in the 10 years prior to 1890, 9.2 for every l, 000. Now, consider three indices of assimilation-language, home ownership and intermarriage.The 1990 Census revealed that "a majority of immigrants from each of the fifteen most common countries oforigin spoke English 'well' or 'very well' after ten years of residence." The children of immigrants tend to be bilingual and proficient in English."By the third generation, the original language is lost in the majority of immigrant families." Hence the description of America as a"graveyard" for languages. By 1996 foreign-born immigrants who had arrived before 1970 had a home ownership rate of 75.6 percent, higher than the 69.8 percent rate among native-born Americans.Foreign-born Asians and Hispanics"have higher rates of intermarriage than do U.S.-born whites and blacks." By the third generation, one third of Hispanic women are married to non-Hispanics, and 41 percent of Asian-American women are married to non-Asians.Rodriguez notes that children in remote villages around the world are fans of superstars like Arnold Schwarzenegger and Garth Brooks, yet"some Americans fear that immigrants living within the United States remain somehow immune to the nation's assimilative power."Are there divisive issues and pockets of seething anger in America? Indeed. It is big enough to have a bit of everything. But particularly when viewed against America's turbulent past, today's social indices hardly suggest a dark and deteriorating social enviromuent.According to the author, the department stores of the 19th century ____.
男，20岁。手枪手弹射中左股根部2天。查体或现伤口红肿，有少许脓性分泌物，且子弹只有入口没有出口。诊断为：（）
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为了解少年儿童的肥胖是否与常喝碳酸饮料有关，现对30名六年级学生进行了问卷调查得到如下列联表：平均每天喝500ml以上为常喝，体重超过50kg为肥胖。 已知在全...
为了解少年儿童的肥胖是否与常喝碳酸饮料有关，现对30名六年级学生进行了问卷调查得到如下列联表：平均每天喝500ml以上为常喝，体重超过50kg为肥胖。 已知在全...
为了解少年儿童的肥胖是否与常喝碳酸饮料有关，现对30名六年级学生进行了问卷调查得到如下列联表：平均每天喝500ml以上为常喝，体重超过50kg为肥胖。 已知在全...
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