单选题尿道结石的主要症状是

单选题A．类风湿关节炎B．膝关节化脓性关节炎C．膝关节滑膜结核D．膝关节全关节结核

单选题男性，19岁。3周前出现发热、咽痛。伴腰痛、肉眼血尿，经口服抗生素治疗后好转。2天前受凉后又出现发热、咽痛及肉眼血尿。既往体健。查体：体温：38．5℃，扁桃体Ⅲ°大，有脓点，面部及双下肢无水肿。尿化验：蛋白(+)，红细胞满视野。24小时蛋白定量0．8g。

单选题外科感染严重的症状是（ ）

单选题过敏性休克患者外周血管阻力的变化是

单选题The idea is as audacious as it altruistic: provide a personal laptop computer to every schoolchild -- particularly in the poorest parts of the world. The first step to making that happen is whittling the price down to $100. And that is the goal of a group of American techno-gurus led by Nicholas Negroponte, the founder of the fabled MIT Media Lab. When he unveiled the idea at the World Economic Forum in January it seemed wildly ambitious. But surprisingly, it is starting to become a reality. Mr. Negroponte plans to display the first prototype in November at a UN summit. Four countries -- Brazil, Egypt, Thailand and South Africa -- have said they will buy over I m units each. Production is due to start in late 2006. How is the group, called One Laptop Per Child (OLPC), able to create a laptop so inexpensively? It is mainly a matter of cleverly combining existing technologies in new ways. The laptop will have a basic processor made by AMD, flash memory instead of a hard disk, will be powered by batteries or a hand-crank, and will run open-source software. The $100 laptop also puts all the components behind the screen, not under the keyboard, so there is no need for an expensive hinge. So far, OLPC has got the price down to around $130. But good news for the world's poor, may not be such great news for the world's computer manufacturers. The new machine is not simply of interest in the developing world. On September 22nd, Mitt Romney, the governor of Massachusetts, said the state should purchase one for every secondary-school student, when they become available. Sales to schools are just one way in which the $100 laptop could change the computer industry more broadly. By depressing prices and fuelling the trend for "good-enough computing", where customers upgrade less often, it could eventually put pressure on the world's biggest PC-makers.

单选题预防腰麻后头痛的主要措施为（ ）

单选题深部脓肿的临床表现是

单选题胰腺组织与内、外分泌的关系中，下列哪项是错误的（ ）

单选题胫骨下1/3处骨折，愈合较慢的原因是A．附近的主要血管损伤B．附近的周围神经损伤C．远侧骨折段完全丧失血液供应D．远侧骨折段血液供应减弱

单选题稳定型股骨颈骨折是

单选题抑制素的化学性质是

单选题A．髓质型B．蕈伞型C．溃疡型D．缩窄型

单选题A．排便可加重肛门疼痛，伴大便带鲜血B．肛周肿痛伴发热C．反复发作的肛周红肿疼痛，窦道外口流出脓性分泌物D．肛门疼痛，伴有局部暗紫色肿块E．排便时出血、无痛

单选题慢痛的传入纤维是

单选题与子宫内膜癌关系最密切的是

单选题外科病人最常见的酸碱平衡失调是

单选题烧伤现场急救时，下列做法不正确的是

单选题女性，21岁，患“肾炎”4年，2天来发热、咳嗽，查体T38℃，重症贫血貌，心界向左下扩大，心率130次/分，右肺满布湿性哕音，肝在肋下1cm，无明显水肿，肾功能严重损害，胸透右肺炎症，应选下列哪种抗生素A．多黏菌素B．卡那菌素C．青霉素D．庆大霉素E．四环素

单选题男，45岁，3年前曾行肺移植，后发生肾衰竭而行肾移植，术后18小时，尿量为1200mL，而20小时起渐无尿排出，血肌酐迅速升高。他发生的排斥度应是