单选题肺扩张反射的主要生理意义是 A.增加肺通气量 B.使呼吸频率减慢 C.使吸气过程延长 D.终止吸气，转为呼气

单选题肝硬化腹水患者，应首选的利尿剂为( )(1997年)

单选题Large, multinational corporations may be the companies whose ups and downs seize headlines. But to a far greater extent than most Americans realize, the economy's vitality depends on the fortunes of tiny shops and restaurants, neighborhood services and factories. Small businesses, defined as those with fewer than 100 workers, now employ nearly 60 percent of the work force and are expected to generate half of all new jobs between now and the year 2000. Some 1.2 million small firms have opened their doors over the past six years of economic growth, and 1989 will see an additional 200,000 entrepreneurs striking off on their own. Too many of these pioneers, however, will blaze ahead unprepared. Idealists will overestimate the clamor for their products or fail to factor in the competition. Nearly everyone will underestimate, often fatally, the capital that success requires. Midcareer executives, forced by a takeover or a restructuring to quit the corporation and find another way to support themselves, may savor the idea of being their own boss but may forget that entrepreneurs must also, at least for a while, be bookkeeper and receptionist, too. According to Small Business Administration data,24 of every 100 businesses starting out today are likely to have disappeared in two years, and 27 more will have shut their doors four years from now. By 1995, more than 60 of those 100 start-ups will have folded. A new study of 3,000 small businesses, sponsored by American Express and the National Federation of Independent Business, suggests slightly better odds: Three years after start-up, 77 percent of the companies surveyed were still alive. Most credited their success in large part to having picked a business they already were comfortable in. Eighty percent had worked with the same product or service in their last jobs. Thinking through an enterprise before the launch is obviously critical. But many entrepreneurs forget that a firm's health in its infancy may be little indication of how well it will age. You must tenderly monitor its pulse. In their zeal to expand, small-business owners often ignore early warning signs of a stagnant market or of decaying profitability. They hopefully pour more and more money into the enterprise, preferring not to acknowledge eroding profit margins that mean the market for their ingenious service or product has evaporated, or that they must cut the payroll or vacate their lavish offices. Only when the financial well runs dry do they see the seriousness of the illness, and by then the patient is usually too far gone to save. Frequent checks of your firm' s vital signs will also guide you to a sensible rate of growth. To snatch opportunity, you must spot the signals that it is time to conquer new markets, add products or perhaps franchise your hot idea.

单选题关于非霍奇金淋巴瘤的描述，正确的是( )(2000年)

单选题男性，30岁，突发水肿、尿少、血尿、血压升高2周，查：血红蛋白100g／L，尿蛋白(++)，红细胞(+++)，血肌酐350μmol／L，BUN26mmol／L，肾脏病理活检示超过50％的肾小球的肾小囊有新月体形成，肾小球中无免疫沉积物。此患者该如何使用糖皮质激素

单选题老年慢支患者，近月来病情加重，感染不易控制，曾用多种抗生素效果欠佳。为明确病因，加强治疗，应首先采取下列哪项检查

单选题急性心肌梗死早期(24小时以内)死亡的主要原因是

单选题A．D860B．氯磺丙脲C．胰岛素D．优降糖E．降糖灵 (1994年)

单选题A．心房感知+心室起搏B．心房起搏+心室感知C．心室起搏+心室感知+感知后抑制D．心房起搏+心房感知+感知后抑制

单选题下述关于心房颤动发病原因的叙述，错误的是( )(2005年)

单选题肺癌中恶性程度最低的类型是A．类癌B．腺癌C．鳞癌D．大细胞癌E．小细胞癌

单选题下列关于SLE的描述，不正确的是

单选题男性，65岁。慢性阻塞性肺病7年。10天前受凉后发热，咳嗽加重，痰黏难咳，2天来神志欠清，发绀、躁动，入院查体双肺呼吸音低，有干、湿性啰音，白细胞计数及分类增高。

单选题男性，54岁。患肝炎后肝硬化10年，近1周来病情加重，腹水量增加，腹胀明显，并出现呼吸困难、睡眠障碍和意识错乱。为减少腹水，下列最佳的治疗药物是

单选题早期胃癌最常见的类型是A．隆起型B．表浅隆起型C．表浅平坦型D．表浅凹陷型E．凹陷型

单选题A．中央型为多见B．周围型多见C．弥漫型多见D．常具有内分泌功能E．肿瘤呈胶冻状 (1997年)

单选题A．主要降低血甘油三酯，也降低血胆固醇的药物B．主要降低血胆固醇，也降低血甘油三酯的药物C．主要降低LDH的药物D．仅降低血甘油三酯的药物E．仅降低血总胆固醇的药物 (2000年)

单选题心室舒张功能障碍可出现的症状为

单选题关于用β 2 肾上腺受体激动剂治疗迟发性哮喘的机制，下列哪项不正确

单选题嗜铬细胞瘤可产生多种肽类激素，其中引起面部潮红的是( )(2004年)