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支气管哮喘的主要临床表现是（）。
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TORCH综合征包括下述哪些疾病（）
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单层采样器的特点是从（）水到深层水都可以由样品瓶直接在水体中采样。
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古巴前领导人卡斯特罗称：“全球化是客观现实，它显示了在这个大家居住的星球上我们都是同一条船上的乘客。一小撮乘客居住在豪华的客舱，85%的乘客拥挤在不卫生的船舱里。很显然，这艘船上不公正的事太多了，它很难浮在水面上。它的航程是如此不合理和荒唐，以致它不可能抵达安全的港口。”这段材料无法揭示出（）。
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贷款人应对抵（质）押物的价值和担保人的担保能力建立贷款质量监控制度和贷款风险预警体系。
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Books are not Nadia Konyks thing. Her mother, hoping to attract her, brings them home from the library, but Nadia rarely shows an interest. Instead, like so many other teenagers, Nadia, 15 , is addicted to the internet. She regularly spends at least six hours a day in front of the computer. Nadia checks her e-mail and reads carefully through myyearbook. com, a social networking site, reading messages or posting updates on her mood. She searches for music videos on youtube. com and logs onto gaiaonline. com, a role-playing site where members exchange identities as cartoon characters. But she spends most of her time on quizilla. com or fan fiction. net, reading and commenting on stories written by other users and based on books, television shows or movies. Her mother, Deborah Konyk, would prefer that Nadia read books for a change. But at this point, Ms. Konyk said, "Im just pleased that she reads something anyway. " Children like Nadia lie at the heart of a passionate(狂热的)debate about just what it means to read in the digital age. As teenagers scores on standardized reading tests have declined, some argue that the hours spent surfing the Internet is the enemy of reading—reducing literacy, destroying attention spans and a valuable common culture that exists only through the reading of books. But others say the Internet has created a new kind of reading, one that schools and society should not discount. The web inspires a teenager like Nadia, who might otherwise spend most of his leisure time watching television, to read and write. Even talented book readers like Zachary Sims, 18, of old Greenwich, Conn. , crave the ability to quickly find different points of view on a subject and talk with others online. Some children with dyslexia(诵读困难)or other learning difficulties, like Hunter Gaudet, 16, of Somers, Conn. , have found it far more comfortable to search and read online.The underlined sentence in Paragraph 1 means______.A．Nadia prefers not to be a writerB．Nadia doesn"t like to buy booksC．Nadia treats reading books as a piece of cakeD．Nadia shows no interest in reading books
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简述酶活力单位的概念和酶活力的测定方法？
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亚里斯多德对（）这一概念的运用是他的体系中的缺点之一。
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下列凝血因子在激活过程中不需要Ca2+参与的是（）
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套筒滚子链的链节数为奇数时，链的接头形式为（）。