单选题对预防过敏性哮喘效果较好的药是

单选题过多过快抽出胸腔积液的最大危害是

单选题女性，35岁，发现血压高3年，血压平时在150～170／80～00mmHg范围波动，数次阵发升高达210／130mmHg，伴头痛、心悸、恶心呕吐，常规降压效果不佳，平素出汗较多，低热，化验血糖空腹6．9mmol／L，餐后2小时10．5mmol／L。此患者最可能的诊断是

单选题氧解离曲线由正常位置向左移，可见于下列哪种情况

单选题结核性胸膜炎和浸润性肺结核均为

单选题关于缺铁性贫血患者的表现，下列哪项不正确A．感染发生率减低B．口角炎、舌炎、舌乳头萎缩较常见C．胃酸缺乏及胃肠功能障碍D．毛发无泽、易断、易脱E．指甲扁平，甚至“反甲”

单选题男性，25岁，2天前不明原因出现干咳、胸闷，继之明显喘憋。给予静滴青霉素治疗无效。近3年来，患者常于秋季出现发作性咳嗽、气短。查体：端坐呼吸，呼吸急促，皮肤黏膜轻度发绀，双肺呼吸音减低，散在哮鸣音，心界不大，脉搏120次／分，无杂音，有奇脉。诊断应首先考虑为

单选题下列哪项不符合系膜毛细血管性肾小球肾炎

单选题The unknown pervades the universe. That which people can see, with the aid of various sorts of telescope, accounts for just 4% of the total mass. The rest, however, must exist. Without it, galaxies would not survive and the universe would not be gently expanding, as witnessed by astronomers. What exactly constitutes this dark matter and dark energy remains mysterious, but physicists have recently uncovered some more clues, about the former, at least. One possible explanation for dark matter is a group of subatomic particles called neutrinos. Neutrinos are thought to be the most abundant particles in the universe. According to the Standard Model, the most successful description of particle physics to date, neutrinos come in three varieties, called "flavors". Again, according to the Standard Model, they are point-like, electrically neutral and massless. But in recent years, this view has been challenged, as physicists realized that neutrinos might have mass. The first strong evidence came in 1998, when researchers at an experiment, based in Japan, showed that muon neutrinos produced by cosmic rays hitting the upper atmosphere had gone missing by the time they should have reached an underground detector. Its operators suspect that the missing muon neutrinos had changed flavor, becoming electron neutrinos or-more likely-tau neutrinos. Theo- ry suggests that this process, called oscillation, can happen only if neutrinos have mass. Over the coming months and years, researchers hope to produce the most accurate measurements yet. The researchers created a beam of muon neutrinos first. On the other side of the target sat a particle detector that monitored the number of muon neutrinos leaving. The neutrinos then travelled 750km (450 miles) through the Earth to a detector in a former iron mine in Soudan, Minnesota. Researchers then were able to confirm that a significant number of muon neutrinos had disappeared-that is, they had changed flavor. While their mass is so small that neutrinos cannot be the sole constituent of dark matter, they have an advantage in that they are at least known to exist. The same cannot be said for sure of another possible form of dark matter being studied by a group of physicists in Italy. If the result continues to withstand scrutiny, it would appear to be evidence for an exotic new sort of fundamental particle, known as an axion, which could also be a type of dark matter.

单选题COPD的发病因素中哪一项最重要

单选题A．支气管腺体肥大、增生；黏膜上皮杯状细胞增多B．肺泡扩张，肺泡壁菲薄或断裂C．肺泡上皮增生，细胞内包涵体形成D．细支气管及周围肺泡化脓性炎E．肺组织高度纤维化

单选题不属于慢性炎症的病变是

单选题A．酚妥拉明试验B．螺内酯(安体舒通)试验C．地塞米松抑制试验D．肾动脉造影E．OGTT试验

单选题关于慢性肉芽肿性炎的描述，错误的是

单选题肺心病急性呼吸衰竭患者血分析结果：pH7．18，PaCO 2 6mmHg，HCO 3 - 6mmol／L，碱剩余一6mmol／L，考虑下列哪一项论断正确

单选题心力衰竭患者伴有高度房室传导阻滞时，应在选择下列哪种治疗的同时使用洋地黄

单选题男性，60岁。因疲劳后突发心悸、呼吸困难、咳嗽、咳泡沫血痰而来院急诊。既往有高血压病、心肌梗死史。查体：血压90／60 mmHg，端坐位，喘息状，口唇发绀，双肺满布中小水泡音，心率140次／分，心音听不清。下列急诊处理中，不正确的是

单选题女性，45岁，既往有Graves病8年，长期口服抗甲状腺素药物治疗，未规律服药，病情时有反复。近2月来感胸闷、心悸。入院后诊断：心房颤动。目前该患者的首选治疗是

单选题下列有关风湿病的描述，哪项是错误的( )(1998年)

单选题A．主动脉夹层B．急性心肌梗死C．肺动脉栓塞D．输尿管结石E．肠系膜动脉栓塞