单选题对胃肠道内分泌细胞的叙述，正确的是

单选题导致主动脉瓣关闭不全的最常见原因

单选题55岁老年患者。慢性咳嗽咳痰病史20年，肺功能检查结果FEV 1 V ／RV C <5％，最可能的诊断为

单选题男性，20岁，头晕、乏力、全身痛、皮肤出现紫癜半月余，胸骨明显压痛，肝肋下1.5cm，脾肋下1cm。血红蛋白60g/L，白细胞2×109/L，血小板0.2×109/L，诊断最可能是A．再生障碍性贫血B．溶血性贫血C．巨幼红细胞性贫血D．急性白血病E．特发性血小板减少性紫癜

单选题A、肌酸激酶MBB、乳酸脱氢酶C、肌钙蛋白T或ID、肌钙蛋白IE、肌红蛋白

单选题缺铁性贫血病人的下列哪一项检查结果不正确( )(2000年)

单选题The question of whether war is inevitable is one, which has concerned many of the world's great writers. Before considering this question, it will be useful to introduce some related concepts. Conflict, defined as opposition among social entities directed against one another, is distinguished from competition, defined as opposition among social entities independently striving for something, which is in inadequate aupply. Competitors may not be aware of one another, while the parties to a conflict are. Conflict and competition are both categories of opposition, which has been defined as a process by which social entities function is the disservice of one another. Opposition is thus contrasted with cooperation, the process by which social entities function in the service of one another. These definitions are necessary because it is important to emphasize that competition between individuals or groups in inevitable in a world of limited resources, but conflict is not. Conflict, nevertheless, is very likely to occur, and is probably an essential and desirable element of human societies. Many authors have argued for the inevitability of war from the premise that in the struggle for existence among animal species, 0nly the fittest survive. In general, however, this struggle in nature is competition, not conflict. Social animals, such as monkeys and cattle, fight to win or maintain leadership of the group. The struggle for existence occurs not in such fights, but in the competition for limited feeding areas and for occupancy of areas free from meat-eating animals. Those who fail in this competition starve to death or become victims to other species. This struggle for existence does not resemble human war, but rather the competition of individuals for jobs, markets, and materials. The essence of the struggle is the competition for the necessities of life that are insufficient to satisfy all. Among nations there is competition in developing resources, trades, skills, and a satisfactory way of life. The successful nations grow and prosper; the unsuccessful decline. While it is true that this competition may induce efforts to expand territory at the expense of others, and thus lead to conflict, it cannot be said that war-like conflict among nations is inevitable, although competition is.

单选题诊断肺心病的主要形态标准是

单选题A、突然，几秒钟内症状达高峰B、急骤，几min后症状可达高峰C、稍缓几h至1～2d症状达高峰D、逐渐发生，至少1周后症状达高峰E、缓慢，一周后症状达高峰

单选题哪项指标不符合心功能不全的表现( )(1995年)

单选题男性，60岁，血压180／105mmHg，胸骨后反复疼痛3周，心率128次／分，伴房性早搏8次／分及短暂心房颤动，选哪项治疗效果最佳

单选题男性，65岁，反复咳嗽、咳痰伴气短10年，肺功能检查提示：残气量增加。残气量／肺总量>40％，该患者最可能的诊断是

单选题A．抑肽酶B．西咪替丁C．生长抑素D．奥美拉唑

单选题军团菌肺炎首选抗菌药物是（ ）

单选题患者，25岁，急性起病，头痛，全身酸痛，少量白色黏液痰，胸部X线检查结果为双肺弥漫性结节性浸润。下列哪项诊断和治疗最适合

单选题下列哪个肯定不是低色素小细胞性贫血A．海洋性贫血B．铁粒幼细胞性贫血C．再生障碍性贫血D．慢性疾病贫血E．缺铁性贫血

单选题A、急性肾炎B、糖尿病肾病C、狼疮肾病D、高血压肾病E、慢性肾小球肾炎

单选题胸痛随深呼吸而加重的情况最常见于

单选题A．伤寒B．菌痢C．阿米巴痢疾D．钩体病E．乙脑 (1988年)

单选题A．甲苯磺丁脲 B．氯磺丙脲C．格列喹酮 D．格列波脲