单选题 股骨颈骨折引起股骨头坏死的主要原因是（ ） A、骨质疏松 B、骨折畸形愈合 C、病人年龄大 D、股骨头血供受损 E、长期卧床

单选题女，23岁，尿频、尿急、尿痛3个月，伴有终末血尿和米汤样尿，尿细菌培养阴性，脓细胞(+++)，抗感染治疗未有好转，血红蛋白95g／L，血尿素氮8．1mmol／L，KUB示肾区不规则钙化，最可能的诊断是

单选题高压蒸汽灭菌对灭菌物品的要求为压力104．0～137．3kPa下

单选题A．脂肪栓塞B．骨化性肌炎（损伤性骨化）C．缺血性肌挛缩D．创伤性关节炎

单选题Not many 25-year-olds can reasonably claim to have changed the world. The IBM personal computer, which was launched in 1981 and celebrates its 25th birthday in August, is a rare exception. Other personal computers had been launched before; but it was the IBM PC that ended up defining the standard around which a vast new industry then coalesced. IBM, the titan of the computing World at the time, quickly lost control of its own creation, allowing others to reap the benefits. But leave aside what the PC has done for the fortunes of particular companies, and instead step back and consider what the PC has done for mankind. The PC's most obvious achievement has been to help make computers cheaper, more widely available and more useful than ever before. Before it appeared, different computers from different manufacturers were mostly incompatible with each other. The PC's architecture was not perfect, but its adoption as an industry standard made possible economies of scale in both hardware and software. This in turn reduced prices and enabled the PC to democratise computing. But although the PC has its merits, it also has its faults. Its flexibility has proved to be both a strength and a weakness: it encourages innovation, but at the cost of complexity, reliability and security. And for people in the developing world, PCs are too bulky, expensive and energy-hungry. W. hen it comes to extending the benefits of digital technology--chiefly, cheap and easy access to information to everyone on the planet, the PC may not be the best tool for the job. Look on the streets of almost any city in the world, however, and you will see people clutching tiny, pocket computers, better known as mobile phones. Already, even basic handsets have simple web-browsers, calculators and other computing functions. Mobile phones are cheaper, simpler and more reliable than PCs, and market forces--in particular, the combination of pie-paid billing plans and microcredit schemes--are already putting them into the hands of even the world's poorest people. Initiatives to spread PCs in the developing world, in contrast, rely on top-down funding from governments or aid agencies, rather than bottom-up adoption by consumers. All kinds of firms, from giants such as Google to start-ups such as CellBazaar, are working to bring the full belle, fits of the web to mobile phones. There is no question that the PC has democratised computing and-unleashed innovation, but it is the mobile phone that now seems most likely to carry the dream of the "personal computer" to its conclusion.

单选题 主动脉瓣关闭不全的最重要的体征是（ ） A、心脏向左下方扩大 B、心尖呈抬举性搏动 C、有水冲脉，枪击音，毛细血管搏动征 D、胸骨左缘第3、4肋间有舒张期叹息样杂音 E、有肝肿大，颈静脉怒张

单选题男性血尿患者，膀胱镜检发现左输尿管口周围膀胱黏膜充血、水肿，散在几个米黄色粟粒大小的小结节。还应做下列哪项检查

单选题下列关于输血速度的描述不正确的是

单选题男性，25岁，汽车撞击右髋部4小时，有尿意但不能自主排尿，体检：110/80mmHg，脉搏94次/分，腹软，下腹部隆起伴轻压痛，肠鸣音正常，右髋部肿胀，皮下淤血，直肠指诊前列腺尖部浮动，X线摄片显示：双侧耻骨上下支骨折。

单选题低钾性碱中毒可能出现于下列哪种情况( )(1995年)

单选题急性乳腺炎的治疗原则不正确的是

单选题对原发性肝癌诊断有特异性的是

单选题A．微小病变肾病B．系膜增生性肾小球肾炎C．系膜毛细血管性肾小球肾炎D．膜性肾病

单选题 有关后天性上睑下垂，下列哪项是错误的 ( ) A、睑缘移动距离小于5mm，则需行以额肌代行上睑提肌功能手术 B、常须1～1年半以上观察确无恢复可能者才考虑手术 C、常为单侧性 D、病因可因动眼神经受伤所致 E、在保持头部不得俯仰活动时，睑缘由下至上移动距离正常值为15mm

单选题大手术前，病人呼吸系统的准备方面，下列哪项错误( )(1993年)

单选题A．化疗B．手术治疗C．放射治疗D．电化学治疗E．化疗＋放射治疗

单选题男，71岁，排尿困难伴尿急、尿痛3年，近1个月尿滴沥，夜尿7～8次。查体：下腹部叩诊浊音；右腹股沟区见可回纳性包块，首先应进行的检查是

单选题外伤后烦躁不安，出冷汗，尿少，血100／85mmI-{g，心率110次／分

单选题 关于皮肤移植下列哪项是错误的 ( ) A、皮瓣可连同骨或肌肉一起移植 B、游离皮片移植不需吻合血管 C、带蒂皮瓣移植属于异体皮肤移植 D、皮瓣移植包括带蒂和游离两种 E、游离皮瓣移植需吻合血管

单选题有关股骨骨折，哪种说法错误