单选题放射性核素肾图检查可以了解A．分侧肾血流量B．分侧肾脏排泌功能C．肾内有无尿流梗阻D．肾脏的形态和位置及无功能区

单选题有关骨盆骨折的说法，下列哪项错误

单选题早期膜性肾小球肾炎的肾脏呈A．大白肾B．大红肾C．蚤咬肾D．固缩肾E．无明显改变

单选题A．上皮细胞足突消失B．上皮下驼峰样沉积物C．系膜区沉积物D．内皮下、致密层和上皮下沉积物

单选题胃大部切除术治疗消化性溃疡的理论基础不包括

单选题下列哪项属于肠外营养本身引起的并发症

单选题以急性肾炎综合征起病的慢性肾炎与感染后急性肾炎的主要鉴别点是

单选题资料统计表明，股骨颈骨折手术后股骨头缺血坏死率为

单选题鉴别腹股沟斜疝和直疝最有意义的体征是A．疝块的形状B．疝块是否进入阴囊C．还纳疝块，压住内环、增加腹压、疝块是否脱出D．是否容易嵌顿E．单侧还是双侧

单选题A．腺体和间质增生B．增生的腺体密集排列C．增生的腺体密集排列．伴腺上皮异型性D．腺体密集伴腺上皮异型性显著。间质浸润

单选题膝关节处于半屈状态，此时突然将膝关节伸直，并伴有旋转动作，可能损伤

单选题腰麻的绝对禁忌症是( )(2011年)

单选题腹膜炎继续存在，血压75／45mmHg，经积极抗休克治疗，仍不好转，此时最适宜的治疗是

单选题The terms college and university originally had very similar meanings. Only (1) the passing of centuries did "university" come to (2) an educational (3) composed of more than one college. During the Middle Ages students (4) the universities of Paris, Oxford, and Cambridge found (5) convenient to rent houses and share expenses (6) living in private apartments. By the 13th century these "houses of scholars" were becoming legally recognized corporate institutions. At Oxford the earliest of these (7) were University College, (8) in 1249 by William of Durham; Balliol College, founded by John Balliol in 1263; and Merton College, founded about 1264 by Walter de Merton. A similar (9) took place at Cambridge. In the United States the word college most commonly (10) to four-year institutions that (11) students from secondary schools and grant a bachelor's (12) after a general (13) of studies. A college may also be a school (14) specialized training that takes place after (15) the bachelor's degree--such as a college of law or medicine. Schools (16) in theological training may be called seminaries or schools instead of colleges. A university normally (17) of a group of colleges--one for the liberal arts or general studies and (18) for engineering, law, medicine, education, and (19) . Some of these colleges are for advanced study, (20) the college of liberal arts is the institution in which one earns a bachelor's degree.

单选题骨与关节结核不适宜做病灶清除手术的情况是

单选题休克的治疗时，尿量的变化常用来估计

单选题女，68岁，间歇性右上腹疼痛10年，疼痛向右肩背部放射，近1周再发右上腹痛，伴畏寒、发热。体查：T38．6℃，脉搏112次/分，血压84/45mmHg，右上腹可扪10cm×8cm包块，张力高，局部压痛、反跳痛明显，腹肌紧张。目前应如何治疗

单选题有关麻醉药成人一次限量，下列哪些是恰当的

单选题最易与气性坏疽混淆的化脓性炎是

单选题There's nothing simple about gun control, a tangle of legal, political and public-health issues complicated by cultural preferences and regional biases. Passions run high on all sides. Lifelong hunters whogrew up with firearms, urban victims of gun violence, Second Amendment scholars, NRA lobbyists, chiefs of police—they've all got cases to make and they make them well, often contentiously. For the past 15 years, much of the debate has centered on the effectiveness of the Brady Handgun Violence Prevention Act, the federal gun-control bill that was passed in 1993. Critics say the focus on law-abiding gun buyers doesn't address the real issue—bad guys who acquire their weapons illegally. Supporters say that the bill stops thousands of illegal gun purchases and deters crime and violence. Now medical research has come to the rescue, sifting through the data to figure out which legal measures work best to reduce firearm suicides and homicides. In a paper published in the May issue of the American Journal of Preventive Medicine, Steven Sumner, a third-year med student and Dr. Peter Layde, codirector of the Injury Research Center at the Medical College of Wisconsin, found that local background checks, which are optional and used by just a handful of states, were more effective than the federal background checks mandated by the Brady law. The report compared the homicide and suicide rates in states that perform only federal checks with states that do state-level checks and those that perform local-level checks. The local-level checks were associated with a 27 percent lower firearm suicide rate and a 22 percent lower homicide rate among adults 21 and older, the legal age to purchase a gun. Why are local checks so much better? "We hypothesize that it's due to access to additional information that's not available at the federal checks," says Layde, "particularly related to mental-health issues and domestic-violence issues." All 50 states use the National Instant Criminal Background Check System (NICS), the minimum required under Brady, while 17 states also perform state-level checks and 12 do additional local-level checks. "This is the first study that's looked at this issue," says Layde. "If the magnitude of impact we found were in fact to apply to all 50 states, you would expect a very substantial reduction in suicides and homicides linked to firearms, many thousands. " However, background checks can be both an administrative and a cost burden for strapped and stretched local authorities. There is another way to get the same results., improve the flow of local information to the NICS databases. "In an ideal world," says Layde, "you might not have to have the local agencies involved if you just reliably got all the data they had up to the federal level. /