单选题下列各项中，哪项更有助于鉴别股骨颈骨折与股骨粗隆间骨折A．髋关节压痛B．患肢轻度内收C．Bryant三角底边短缩D．患肢外旋角度E．患肢短缩程度

单选题男，54岁，右侧阴囊肿大5个月余，无外伤手术史。查体：右侧阴囊明显增大，囊性感，表面光滑无压痛，睾丸未及。

单选题损伤性动静脉瘘的诊断中，既能明确诊断又能了解瘘口的部位和大小的检查方法是

单选题戴无菌手套时，尚未戴无菌手套的手，只能允许接触手套的( )(1990年)

单选题有关骨肉瘤的血生化检查，下列哪项是不恰当的

单选题A．胃十二指肠溃疡B．门静脉高压症C．应激性溃疡D．胆道出血

单选题When Newsweek recently asked 1,000 U. S. citizens to take America's official citizenship test, 29 percent couldn't name the vice president. Seventy-three percent couldn't correctly say why we fought the Cold War. Forty-four percent were unable to define the Bill of Rights. And 6 percent couldn't even circle Independence Day on a calendar. Don't get us wrong: civic ignorance is nothing new. For as long as they've existed, Americans have been misunderstanding checks and balances and misidentifying their senators. And they've been lamenting the ignorance of their peers ever since pollsters started publishing these dispiriting surveys back in Harry Truman's day. According to a study by Michael X. Delli Carpini, dean of the Annenberg School for Communication, the yearly shifts in civic knowledge since World War II have averaged out to "slightly under 1 percent. " But the world has changed. And unfortunately, it's becoming more and more inhospitable to incurious know-nothings—like us. To appreciate the risks involved, it's important to understand where American ignorance comes from. In March 2009, the European Journal of Communication asked citizens of Britain, Denmark, Finland, and the U.S. to answer questions on international affairs. The Europeans outdid us. It was only the latest in a series of polls that have shown us lagging behind our First World peers. Most experts agree that the relative complexity of the U. S. political system makes it hard for Americans to keep up. In many European countries, parliaments have proportional representation, and the majority party rules without having to "share power with a lot of subnational governments," notes Yale political scientist Jacob Hacker. In contrast, we're saddled with a nonproportional Senate; a tangle of state, local, and federal bureaucracies; and near-constant elections for every imaginable office (judge, sheriff, school-board member, and so on). "Nobody is competent to understand it all, which you realize every time you vote," says Michael Schudson, author of The Good Citizen. "You know you're going to come up short, and that discourages you from learning more. " It doesn't help that the United States has one of the highest levels of income inequality in the developed world, with the top 400 households raking in more money than the bottom 60 percent combined. As Dalton Conley, an NYU sociologist, explains, "it's like comparing apples and oranges. Unlike Denmark, we have a lot of very poor people without access to good education, and a huge immigrant population that doesn't even speak English. " When surveys focus on well-off, native-born respondents, the U. S. actually holds its own against Europe. For more than two centuries, Americans have gotten away with not knowing much about the world around them. But times have changed—and they've changed in ways that make civic ignorance a big problem going forward. We suffer from a lack of information rather than a lack of ability. Whether that's a treatable affliction or a terminal illness remains to be seen. But now's the time to start searching for a cure.

单选题A．细胞毒素类B．抗代谢类C．抗生素类D．生物碱类E．激素类

单选题女，52岁，车祸伤2小时。体格检查：神志清，血压20/70mmHg，气管向左侧移位，右胸壁大量皮下捻发音，右侧叩诊鼓音，右侧呼吸音明显减弱。胸片：右第4、8、9肋骨折，左第7、8、9肋骨折，右肺压缩90％。

单选题在下列检查方法中，对甲状腺肿瘤诊断正确率高的方法是

单选题下列关于全身性外科感染的叙述，哪项是错误的( )(2003年)

单选题关于消化性溃疡大出血的叙述，下列哪项不恰当

单选题腹外疝的疝囊是( )(1989年)

单选题下列关于腹部损伤的描述正确的是

单选题需要进行直肠镜检查的是

单选题 腹股沟直疝的特点之一为 A、可分为完全性和不完全性两种 B、疝块突出在腹股沟部内侧和耻骨结节的上外方 C、腹股沟管后壁无严重缺损 D、有先天性和后天性之分 E、因疝内容物较多，容易发生嵌顿

单选题对于大面积烧伤患者，24小时内最大的威胁是

单选题在骨折复位后，下一步关键治疗是（ ）

单选题A．等渗性缺水 B．低渗性缺水 C．高渗性缺水 D．原发性缺水

单选题 微生物学起源于17世纪下半叶，始于荷兰的列文虎克发明了显微镜并观察与记录了活的细菌、精子、血细胞等。19世纪是微生物学史上的黄金年代，有关微生物与疾病关系的重大发现接踵而至。微生物广泛涵盖了真菌、原生生物和细菌中的不同生物体，其特性各不相同。关于古菌的描述，哪项是错误的（ ） A、在高温（低温）环境下或者可产生甲烷 B、生物可分为三个域：真核生物、真细菌和古菌 C、古菌可生长在地球上最为苛刻的环境中（如格陵兰岛深达3000m的冰层下、113℃的高温温泉中或饱和的盐溶液内）以及海洋浮游生物体内 D、古菌是细菌的一种 E、古菌作为产生甲烷的微生物，存在于牛、白蚁和海洋生物的消化道内