单选题心房扑动时，为转律首先选用

单选题中央型肺气肿是指( )(2011年)

单选题A、血清抗肾小球基膜抗体阳性B、血清ANCA阳性C、两者均有D、两者均无

单选题急性淋巴细胞白血病引起的睾丸白血病最常发生的时间是

单选题肝硬化患者发生原发性腹膜炎的原因是( )(1991年)

单选题哪项关于中毒性痢疾的描述是错误的( )(1993年)

单选题It is no longer just dirty blue-collar jobs in manufacturing that are being sucked offshore but also white-collar service jobs, which used to be considered safe from foreign competition. Telecoms charges have tumbled, allowing workers in far-flung locations to be connected cheaply to customers in the developed world. This has made it possible to offshore services that were once non-tradable. Morgan Stanley's Mr. Roach has been drawing attention to the fact that the "global labour arbitrage" is moving rapidly to the better kinds of jobs. It is no longer just basic data processing and call centres that are being outsourced to low-wage countries, but also software programming, medical diagnostics, engineering design, law, accounting, finance and business consulting. These can now be delivered electronically from anywhere in the world, exposing skilled white-collar workers to greater competition. The standard retort to such arguments is that outsourcing abroad is too small to matter much. So far fewer than lm American service-sector jobs have been lost to off-shoring. Forrester Research forecasts that by 2015 a total of 3.4m jobs in services will have moved abroad, but that is tiny compared with the 30m jobs destroyed and created in America every year. The trouble is that such studies allow only for the sorts of jobs that are already being off-shored, when in reality the proportion of jobs that can be moved will rise as IT advances and education improves in emerging economies. Alan Blinder, an economist at Princeton University, believes that most economists are underestimating the disruptive effects of off-shoring, and that in future two to three times as many service jobs will be susceptible to off-shoring as in manufacturing. This would imply that at least 30% of all jobs might be at risk. In practice the number of jobs off-shored to China or India is likely to remain fairly modest. Even so, the mere threat that they could be shifted will depress wages: Moreover, says Mr. Blinder, education offers no protection. Highly skilled accountants, radiologists or computer programmers now have to compete with electronically delivered competition from abroad, whereas humble taxi drivers, janitors and crane operators remain safe from off-shoring. This may help to explain why the real median wage of American graduates hat fallen by 6% since 2000, a bigger decline than in average wages. In the 1980s and early 1990s, the pay gap between low-paid, low-skilled workers and high-paid, high-skilled workers widened significantly. But since then, according to a study by David Autor, Lawrence Katz and Melissa Kearney, in America, Britain and Germany workers at the bottom as well as at the top have done better than those in the middle-income 'group. Office cleaning cannot be done by workers in India. It is the easily standardised skilled job? in the middle, such as accounting, that are now being squeezed hardest. A study by Bradford Jensen and Lori Kletzer, at the Institute for International Economics in Washington D. C., confirms that workers in tradable services that are exposed to foreign competition tend to be more skilled than workers in non-tradable services and tradable manufacturing industries.

单选题COPD并发肺心病缓解期的治疗，下列说法错误的是

单选题下列哪项最符合慢性阻塞性肺病的诊断

单选题 胃溃疡穿孔在哪一部位多见： A、胃底 B、胃体 C、胃小弯 D、胃大弯 E、胃窦

单选题国际血液学标准化委员会（ICSH）推荐的中性粒细胞碱性磷酸酶染色法为

单选题与硅沉着病发病关系最密切的细胞是

单选题With one eye turned towards keeping its own economy on track and the other trained fearfully on the impact of the global economic downturn, China has announced a four trillion yuan ($ 586 billion) stimulus package, the largest in the country's history. Unveiled by China's State Council on the evening of Sunday November 9th, the two-year spending initiative will inject funds into ten sectors, including health care, education, low- income housing, environmental protection, schemes to promote technological innovation, and transport and other infrastructure projects. The government also says that some of the spending will be directed to reconstruction efforts in areas battered by natural disasters, such as Sichuan province which was devastated by a massive earthquake in May. "Over the past two months, the global financial crisis has been intensifying daily," the State Council said in a statement. "In expanding investment, we must be fast and heavy- handed. " News of the stimulus package has been welcomed by global investors. Asian and European stock markets rose on Monday, with American markets also climbing. China's decisive move is likely to please foreign governments which are now grappling with the global downturn. It comes a few days before the Chinese president is scheduled to attend a global economic summit in Washington D. C. , and a day after Hu Jintao had spoken by phone to the American president-elect, Barack Obama, about the global economic crisis and other issues. China's government has so far provided few details of when the money will be spent or how it will be divided. Officials do say that fourth quarter investment for this year will total 400 billion yuan, including 20 billion yuan brought forward from next year's central government budget. If fully realised, the two-year spending spree would amount to about 16% of China's annual gross domestic product. The newly announced measures also include a loosening of credit policies and tax cuts. The plan calls for reforms in the country's value-added tax regime that would save industry 120 billion yuan, according to an estimate by the government. Credit ceilings for commercial banks are to be abolished in the hope of channelling more capital to small enterprises, rural areas and unspecified "priority projects". The government is concerned about the potential for frivolous or speculative investments, so the State Council also decreed at its meeting on Sunday that credit expansion must be "rational" and should "target spheres that would promote and consolidate the expansion of consumer credit". Finding ways to get Chinese consumers spending should be a priority. Unleashing domestic demand has been a longstanding goal of Chinese policymakers, but Chinese consumers-with few of their health-care or retirement needs reliably met either by employers or the state-often prefer to save. China has sustained double-digit economic growth rates over the past five years but the economy has been slowing, considerably in some sectors. The economy logged a growth rate of 11.9% last year, but many forecasters believe that it will dip below 10% this year, with fourth-quarter growth down to 6% or even lower. Growth rates in that range may be the envy of recession-battered economies, but mark signs of trouble for China. It is an article of faith among many economists-and a view publicly stated earlier this year by the Chinese Prime Minister, Wen Jiabao-that China needs a growth rate of at least 7% to avoid massive unemployment. The country has been hurt in recent months by softening export markets, depressed domestic property values and stock markets, and declining consumer and investor confidence.

单选题男性，47岁，腹胀、纳差半年，6小时前突然呕血约1000mL来急诊，既往HBsAg(+)。查体示P125次／分，BP70／50mmHg，巩膜轻度黄染，肝脾肋下未触及，移动性浊音(+)，下肢有可凹性水肿。(2007年)

单选题下列物质中，由胰腺小导管细胞分泌的是

单选题 隐孢子虫病的病原学诊断一般不采取下列哪项检查 ( ) A、从粪便中查卵囊 B、从呕吐物中查卵囊 C、从痰液中查卵囊 D、从胃液中查卵囊 E、从血液中培养隐孢子虫

单选题某患者，发热后出现右侧胸痛，吸气时加重，干咳无痰，下面哪项检查对诊断有重要意义

单选题阵发性室上性心动过速的心电图诊断，下列哪项不正确( )(1999年)

单选题 哪一种不是下丘脑小细胞性神经分泌系统分泌的激素 A、生长激素释放激素(GRH)和催乳激素释放激素(PRF) B、促甲状腺激素释放激素(TRH) C、催产素 D、促肾上腺皮质激素释放激素(CRF) E、促性腺激素释放激素(GnRH)和黑色素细胞刺激素释放激素(MRF)

单选题 重度有机磷中毒的主要表现是 A、瞳孔明显缩小，大汗，流涎，视力模糊 B、瞳孑呲缩小，大汗，流涎，步态蹒跚，腹泻 C、瞳孔明显缩小，大汗，流涎，神志模糊，血压上升 D、瞳孔明显缩小，大汗，流涎，肌肉颤动，心率加快 E、瞳孔明显缩小，肌肉颤动，大汗，流涎，昏迷，肺水肿，呼吸衰竭