单选题关于正常骨髓象的描述，不正确的是

单选题完全性阻塞性肺不张病人下列体征哪项不对

单选题Nobody ever went into academia to make a fast buck. Professors, especially those in medical-and technology-related fields, typically earn a fraction of what their colleagues in industry do. But suddenly, big money is starting to flow into the ivory tower, as university administrators wake up to the commercial potential of academic research. And the institutions are wrestling with a whole new set of issues. The profits are impressive: the Association of University Technology Managers surveyed 132 universities and found that they earned a combined $ 576 million from patent royalties in 1998, a number that promises to keep rising dramatically. Schools like Columbia University in New York have aggressively marketed their inventions to corporations, particularly pharmaceutical and high-tech companies. Now Columbia is going retail on the Web. It plans to go beyond the typical "dot. edu" model, free sites listing courses and professors' research interests. Instead, it will offer the expertise of its faculty on a new for-profit site which will be spun off as an independent company. The site will provide free access to educational and research content, say administrators, as well as advanced features that are already available to Columbia students, such as a simulation of the construction and architecture of a French cathedral and interactive 3-D models of organic chemicals. Free pages will feel into profit-generating areas, such as online courses and seminars, and related books and tapes. Columbia executive vice provost Michael Crow imagines "millions of visitors" to the new site, including retirees and students willing to pay to tap into this educational resource. "We can offer the best of what's thought and written and researched," says Ann Kirschner, who heads the project. Columbia also is anxious not be aced out by some of the other for-profit "knowledge sites," such as About. com and Hungry Minds. " If they capture this space," says Crow, "they'll begin to cherry-pick our best faculty. " Profits from the sale of patents typically have been divided between the researcher, the department and the university, and Web profits would work the same way, so many faculty members are delighted. But others find the trend worrisome: is a professor who stands to profit from his or her research as credible as one who doesn't? Will universities provide more support to researchers working in profitable fields than to scholars toiling in more musty areas? "If there's the perception that we might be making money from our efforts, the authority of the university could be diminished," worries Herve Varenne, a cultural anthropology professor at Columbia's education school. Says Kirschner: "We would never compromise the integrity of the university. "Whether the new site can add to the growing profits from patents remains to be seen, but one thing is clear. It's going to take the best minds on campus to find a new balance between profit and purity.

单选题A．呕血伴节律性上腹痛B．呕血伴脾肿大C．呕血伴右上腹痛、黄疸、发热D．呕血伴皮肤黏膜出血E．剧烈呕吐后继而呕血

单选题下列疾病中DL CO 测定结果可能高于正常的情况是

单选题A．左房肥大B．右房肥大C．左室肥大D．右室肥大

单选题A．Austin-Flint杂音B．Graham-Steell杂音C．胸骨左缘第2肋间连续性杂音D．突然出现的胸骨左缘第4肋间的舒张期杂音

单选题30岁，男性。因发热、右侧胸痛、咳嗽3天入院。3天来每日体温最低为39．2℃，最高39．8℃。入院后查体：T39．5℃，右锁骨下可闻及支气管呼吸音。

单选题A．柏油样大便B．鲜红色大便C．黑便D．红豆汤样大便

单选题血小板计数减少而骨髓中巨核细胞增多的是

单选题关于T波，下述哪种说法是错误的

单选题A．瞳孔缩小B．瞳孔扩大C．瞳孔大小不等D．瞳孔对光反射消失

单选题腹部体检时有液波震颤见于

单选题引起咯血最常见的支气管一肺部疾病是

单选题大量胸腔积液时下列体征哪项不对

单选题正常情况下不会出现颈静脉搏动，颈静脉搏动见于

单选题青年胸痛，下列哪种疾病的可能性最小

单选题胸痛后双上肢血压差别悬殊的情况见于

单选题哪种情况下第一心音增强

单选题第二心音的组成主要是