单选题对于氯霉素引起再生障碍性贫血的说法，下列哪项不正确( )(1999年)
单选题A．抗炎作用B．抑制肥大细胞释放介质C．两者均有D．两者均无
单选题肺癌中恶性程度最低的类型是( )(2005年)
单选题下列是右心衰竭致心源性水肿时的体征，除了
单选题心房颤动的心电图中，f波频率在（ ）
单选题肝硬化患者肝肾综合征的发生是由于
单选题下列不符合继发性肺结核病变特点的是
单选题女性，75岁，胸痛4小时入急诊室，突然意识丧失，心电监护示室性逸搏心律，30次／分，应首先考虑应予
单选题女性，30岁。月经量多已2年，近3个月来感乏力、头晕、心悸。查血红蛋白65g／L，白细胞6．0×10
9
／L。血小板140×10
9
／L。骨髓象粒比红为1：1，红细胞增生活跃，中晚幼红细胞占45％，体积小，胞质偏蓝。
单选题缓解气胸病人呼吸困难的首选方法是（ ）
单选题应用改变病情抗风湿药治疗类风湿关节炎时，一般首选的药物是( )(2012年)
单选题当呼吸幅度减小而呼吸频率增加，受影响最大的是
单选题支气管哮喘是以下列哪些细胞反应为主的气道炎症状疾病
单选题患者，女，26岁，反复口腔溃疡、颜面部皮疹3年，化验检查外周血白细胞及血小板减少，尿蛋白(＋)，ANA 1：640，C3减低。目前最恰当的诊断是
单选题非典型肺炎属于( )(2004年)
单选题患者，男，65岁。慢性咳嗽、咳痰20年，伴喘息7年，加重1周。吸烟40年，1包/天。查体：两肺可闻及干、湿啰音，心律整，动脉血气分析示：pH7.28，PaO、52mmHg，PaCO276mmHg。可采用的治疗方法有
单选题符合缺铁性贫血潜伏期的是A．血清铁蛋白下降B．血清铁下降C．转铁蛋白饱和度下降D．总铁结合力下降E．小细胞低色素性贫血
单选题下列关于二尖瓣关闭不全患者早期病理生理改变的叙述，正确的是A．左心房压力负荷增加B．左心室压力负荷增加C．左心室容量负荷增加D．肺静脉压力负荷增加E．肺静脉容量负荷增加
单选题She knew how to make an entrance. Her dark hair cut in a severe pageboy, Ayn Rand would sweep into a room with a long black cape, a dollar-sign pin on her lapel and an ever present cigarette in an ivory holder. Melodramatic, yes, but Rand didn't have time to be subtle. She had millions of people to convert to objectivism, her philosophy of radical individualism, limited government and avoidance of altruism and religion. Her adoring followers--some called them a cult--revered her as the high priestess of laissez-faire capitalism until her death in 1982 at age 77. The bad economy has been good news for Rand's legacy. Her fierce denunciations of government regulation have sent sales of her two best-known novels, The Fountainhead and Atlas Shrugged, soaring. Yet her me-first brand of capitalism has been exccoriated (严厉批评) for fomenting (引发) the recent financial crisis. And her most famous former acolyte-onetime Fed chairman Alan Greenspan--has been blamed for inflating the housing bubble by refusing to intervene in the market. In the midst of the newly rekindled debate, two excellent biographies have just been published: Ayn Rand and the World She Made, by Anne C. Heller (Doubleday; 592 pages), is a comprehensive study, in novelistic detail, of Rand's personal life, and Goddess of the Market : Ayn Rand and the American Right, by Jenniter Burns (Oxford; 369 pages), leans more heavily on Rand's theories and politics. From her earliest years, Rand was a woman on a mission. Born in 1905 to a bourgeois Jewish family in St. Petersburg, Rand was 12 when the Bolshevik Revolution took place. Her family, suddenly poor, was forced to flee, and Rand's hatred of communism and any sort of collectivism would guide her life. Arriving in the US in 1926 with a new name, Ayn (rhymes with fine) made her way to Hollywood, where she had modest success as a screenwriter and married an aspiring actor, Frank O'Connor. Her politicization came when she and her husband worked on Republican Wendell Willkie's losing presidential campaign in 1940. According to Burns, "Before Willkie she had been pro-capitalist yet pessimistic, writing 'The capitalist world is low, unprincipled, and corrupt. ' Now she celebrated capitalism as the 'noblest, cleanest and most idealistic system of all'. " The Fountainhead, an epic novel chronicling the struggles of an architect named Howard Roark against conventional values, was her breakout work. In her race to get the sprawling 700-page book to press, she began taking the amphetamine Benzedrine (一种兴奋剂的名称) to fuel her efforts. "Rand used it to power her last months of work on the novel, including several 24-hour sessions correcting page proofs," writes Burns. The book brought Rand financial security and fame.
单选题关于ALI／ARDS的治疗，错误的是