单选题不符合金黄色葡萄球菌肺炎特点的是

单选题心迷走神经节后纤维起始于

单选题下列骨折愈合描述中，骨折处表现为肉芽组织和排列紊乱的骨小梁的是

单选题A．血栓栓塞B．脂肪栓塞C．空气栓塞D．肿瘤栓塞

单选题下列肝细胞坏死中，属于凋亡的是

单选题对氨基酰-tRNA特性的叙述，错误的是

单选题组织液生成的有效滤过压等于

单选题下列不符合骨瘤特点的是

单选题A.醛固酮分泌增多B.血浆晶体渗透压升高C.血浆胶体渗透压降低D.ADH分泌减少

单选题物质在特殊细胞膜蛋白质帮助下顺电化学梯度通过细胞膜的过程属于

单选题精子的获能部位在

单选题男，31岁，酗酒时间约8年余，每日消费北京二锅头约500mL。肝穿刺显示肝细胞广泛脂肪变性，肝细胞灶状坏死。肝细胞内可见大小不等的红染的半透明小体。这些透明小体为

单选题患者男性，40岁，背部红、肿、热、痛7天，表面有三、四个破口，流黄色汁液。其病变由

单选题If you smoke, you'd better hurry. From July 1st pubs all over England will, by law, be no-smoking areas. So will restaurants, offices and even company cars, if more than one per-son uses them. England's smokers are following a well-trodden path. The other three bits of the United Kingdom have already banned smoking in almost all enclosed public spaces, and there are anti-smoking laws of varying strictness over most of Western Europe. The smoker' s journey from glamour through toleration to suspicion is finally reaching its end in pariah status. But behind this public-health success story lies a darker tale. Poorer people are much more likely to smoke than richer ones—a change from the 1950s, when professionals and la-borers were equally keen. Today only 15% of men in the highest professional classes smoke, but 42% of unskilled workers do. Despite punitive taxation—20 cigarettes cost around ￡ 5.00 ($10.00), three-quarters of which is tax—55% of single mothers on benefits smoke. The figure for homeless men is even higher; for hard-drug users it is practically 100% . The message that smoking kills has been heard, it seems, but not by all. Having defeated the big killers of the past—want, exposure, poor sanitation—governments all over the developed world are turning their attention to diseases that stem mostly from how individuals choose to live their lives. But the same deafness afflicts the same people when they are strongly encouraged to give up other sorts of unhealthy behavior. The lower down they are on practically any pecking order—job prestige, income, education, background-the more likely people are to be fat and unfit, and to drink too much. That tempts governments to shout ever louder in an attempt to get the public to listen and nowhere do they do so more aggressively than in Britain. One reason is that pecking orders matter more than in most other rich countries: income distribution is very unequal and the unemployed, disaffected, ill-educated rump is comparatively large. Another reason is the frustration of a government addicted to targets, which often aim not only to improve some-thing but to lessen inequality in the process. A third is that the National Health Service is free to patients, and paying for those who have arguably brought their ill-health on themselves grows alarmingly costly. Britain' s aggressiveness, however, may be pointless, even counter-productive. There is no reason to believe that those who ignore measured voices will listen to shouting. It irritates the majority who are already behaving responsibly, and it may also undermine all government pronouncements on health by convincing people that they have an ultra-cautious margin of error built in. Such hectoring may also be missing the root cause of the problem. According to Mr. Marmot, who cites research on groups as diverse as baboons in captivity, British civil servants and Oscar nominees, the higher rates of ill health among those in more modest walks of life can be attributed to what he calls the "status syndrome". People in privileged positions think they are worth the effort of behaving healthily, and find the will-power to do so. The implication is that it is easier to improve a person's health by weakening the connection between social position and health than by targeting behavior directly. Some public-health experts speak of social cohesion, support for families and better education for all. These are bigger undertakings than a bossy campaign; but more effective, and quieter.

单选题下列不符合肝硬化腹水形成原因的描述是

单选题胸膜腔内负压的形成主要是由于

单选题寄生虫感染时，病灶内最多见的炎症细胞是

单选题A．核糖体A位 B．核糖体P位C．核糖体E位 D．核糖体C位E．核糖体G位

单选题患者女性，50岁，急性腹痛入院。既往有高血压病史。查体：血压90／50mmHg，四肢温度低，肢端色苍白、腹部无明显包块，无腹肌紧张及反跳痛。超声诊断为主动脉夹层瘤。可导致主动脉夹层瘤的是

单选题具有体温调定点作用的中枢位于