单选题慢性肺心病肺动脉高压形成的最主要的原因是

单选题Some oil companies plan to get rid of some of the pollution they produce by pumping it into rocks deep inside the Earth, where they say it will stay for thousands of years. Other people, though, aren't so sure this is advisable; environmental groups say that putting this pollution back into the Earth is a bad idea. When oil burns, it doesn't just produce heat: it also produces carbon dioxide. Carbon dioxide is a natural part of the air, but because people burn so much oil, there's too much carbon dioxide in the air. This extra carbon dioxide is pollution; some scientific studies show that carbon dioxide is one of the "greenhouse gases 'that is causing the Earth's temperature to rise. Environmentalists say that the oil companies' plans may not work. The oil companies say they are making sure that the gas will never escape, but environmentalists wonder how the oil companies can be so sure that the gas won' t seep into the air. They also point out that there's no way to check to make sure the gas isn't leaking. In addition, the environmentalists point out that the pumping costs money—for research and for equipment—that the oil companies should be spending on preventing pollution, rather than on just moving it someplace else. Another problem, say some people who are concerned about the Earth, is that if the oil companies find a cheap way to get rid of their pollution, they won' t look for new kinds of energy. These environmentalists say that energy companies should be researching ways to use hydrogen, wind power, and solar power instead of finding better ways to use oil. They argue that continuing to use oil means that we will still need to buy oil from other countries instead of producing our own cheap, clean energy. Environmentalists also say that burying pollution just pushes the problem into the future, rather than really solving it. They say that if the oil companies pump carbon dioxide into the rocks inside the Earth, it will be there for thousands of years, and that no one knows if this plan—even if it works—might turn into a pollution problem for all of us in the future. The oil companies insist that their plan is safe, and that putting the gas inside the Earth is a reasonable way to deal with it. They point out that there is a lot of room in the Earth for this extra gas, and that putting carbon dioxide inside the Earth means that the gas won' t be in the air, and if it' s not in the air, it won' t make the Earth warmer.

单选题肺炎球菌肺炎用青霉素治疗，停药的特征是

单选题A．寻常性间质性肺炎(UIP)B．脱屑性间质性肺炎(DIP)C．非特异性间质性肺炎(NSIP)D．急性间质性肺炎(AIP)E．隐源性机化性肺炎((COP)

单选题不依赖ACTH的Cushing综合征的病因是A．垂体微腺瘤B．肾上腺皮质癌C．小细胞肺癌D．胸腺癌

单选题男性患者，68岁。发热、关节痛、乏力、恶心10天，查尿Pro(＋＋)，RBC 10个／HP，WBC 5～6个／HP；血肌酐360μmoL／L，P－ANCA(＋)，胸片双下肺纹理增多。最可能的诊断为

单选题15岁男性，临床诊断为急性肾炎，最常见的是由哪种病原体感染所致

单选题严重充血性心力衰竭患者的胸腔积液。化验结果符合下列哪项

单选题与维生素B 12 吸收有关的内因子是由胃黏膜中哪种细胞产生的(1993，1994)

单选题下述哪项是扩张型心肌病的主要病理特征

单选题男性，40岁，发现心脏杂音2年，患者出现下列哪项改变对明确风湿性心脏病的诊断最有价值

单选题A．乙型肝炎 B．长期大量饮酒C．毒物接触 D．药物E．营养不良

单选题A．环磷酰胺B．长春新碱C．硫唑嘌呤D．环孢素

单选题急性粒细胞白血病M3型的染色体异常的是

单选题A．胸痛伴吞咽困难B．胸痛伴呼吸困难C．胸痛呈阵发性伴重压窒息感D．胸痛于咳嗽时加剧

单选题女性，30岁，反复发作脓血便，伴膝关节疼痛，多次细菌培养阴性，X线钡剂检查示乙状结肠袋消失，管壁平滑变硬，肠管缩短，肠腔狭窄，下列哪种诊断可能性大

单选题下列哪项是心力衰竭的基本病因A．人口老龄化B．急性心肌梗死急性期死亡率降低C．随年龄增加心肌细胞数减少D．原发性心肌舒缩功能障碍E．应用负性肌力作用的抗心律失常药物过多

单选题房性期前收缩与室性期前收缩最具鉴别意义的是

单选题女性，28岁，因与他人争吵后服甲胺磷一口，20分钟后被送到村卫生室给予洗胃、静脉注射阿托品治疗，但病情逐渐加重，8小时后送市人民医院急诊。体检：T 40℃，P 140次／分，R 36 次／分，BP 90／60mmHg，谵妄状态，躁动不安，皮肤干燥潮红，瞳孔直径6mm，膀胱充盈。下列哪项处理是不恰当的

单选题女性，56岁，一周前上感伴咳嗽，三小时前突然略鲜血，量达200mL，无胸痛。既往有痰中带鲜血史。查体：体温37．3℃，血压正常，双肺叩清。X线胸片示双轨征及卷发样阴影，最可能的诊断为