单选题A．低血糖B．乳酸酸中毒C．胃肠反应D．肝、肾损害 (2007年)

单选题男性，48岁，近1周内发现血压升高156／98mmHg，服用利尿剂氢氯噻嗪降压效果不佳，且出现四肢行走无力，测血钾为2．2mmol／L。

单选题A．肺炎链球菌肺炎 B．葡萄球菌肺炎C．肺炎克雷伯杆菌肺炎 D．肺炎支原体肺炎

单选题支气管哮喘的发病与下列哪种物质无关

单选题关于胸腔积液病因的描述，哪项是正确的

单选题与结核杆菌的毒力有关的是

单选题关于消化性溃疡并发出血，以下叙述正确的是

单选题女性，66岁，风心病二尖瓣狭窄并关闭不全、主动脉瓣关闭不全病史30年，劳力时胸痛，可试用下列哪一药物

单选题A．垂体后叶素B．6－氨基己酸C．维生素KD．去甲上腺素E．输新鲜血

单选题下列哪种抗心律失常药物属Ia类A．利多卡因B．吡二丙胺(丙吡胺)C．普罗帕酮(心律平)D．美西律(慢心律)E．胺碘达隆(乙胺碘呋酮)

单选题下列哪项不属于左心功能不全的临床表现A．心尖部舒张期奔马律B．交替脉C．呼吸困难D．颈静脉怒张E．端坐呼吸

单选题关于胸腔积液的抽液治疗，不恰当的是

单选题慢性支气管炎发展至肺气肿演变过程中，最早出现的是

单选题在类风湿关节炎发病中起主要作用的细胞是A．CD1+细胞B．CD4+细胞C．CD8+细胞D．B淋巴细胞E．巨噬细胞

单选题A．左心室向心性肥大B．颗粒性固缩肾C．两者皆有D．两者皆无

单选题肝硬化的特征性病变是

单选题慢性心房颤动应用洋地黄的主要目的是( )(2009年)

单选题女，22岁，贫血，鼻出血，发热，全血细胞减少，白细胞分类未见到幼稚细胞。为鉴别非白血性白血病与再生障碍性贫血，最主要需检查( )(1990年)

单选题Whether to teach young children a second language is disputed among teachers, researchers and pushy parents. On the one hand, acquiring a new tongue is said to be far easier when young. On the other, teachers complain that children whose parents speak a language at home that is different from the one used in the classroom sometimes struggle in their lessons and are slower to reach linguistic milestones. Would a 15-month-old child, they wonder, not be better off going to music classes? A study just published in the Proceedings of the National Academy of Sciences may help resolve this question by getting to the point of what is going on in a bilingual child’s brain, how a second language affects the way he thinks, and thus in what circumstances being bilingual may be helpful. Agnes Kovacs and Jacques Mehler at the International School for Advanced Studies in Trieste say that some aspects of the cognitive development of infants raised in a bilingual household must be undergoing acceleration in order to manage which of the two languages they are dealing with. The aspect of cognition in question is part of what is termed the brain’s “executive function”. This allows people to organise, plan, prioritise activity, shift their attention from one thing to another and suppress habitual responses. Bilingualism is common in Trieste which, though Italian, is almost surrounded by Slovenia. So Dr. Kovacs and Dr. Mehler looked at 40 “preverbal” seven-month-olds, half raised in monolingual and half in bilingual households, and compared their performances in a task that needs control of executive function. First, the babies were trained to expect the appearance of a puppet on a screen after they had heard a set of meaningless words invented by the researchers. Then the words, and the location of the puppet, were changed. When this was done, the babies who speak only one language had difficulty overcoming their learnt response, even when the researchers gave them further clues that a switch had taken place. The bilingual babies, however, found it far easier to switch their attention — counteracting the previously learnt, but no longer useful response. Monitoring languages and .keeping them separate is part of the brain’s executive function, so these findings suggest that even before a child can speak, a bilingual environment may speed up that function’s development. Before rushing your offspring into bilingual kindergartens, though, there are a few cautions. For one thing, these extraordinary cognitive benefits have been demonstrated so far only in “crib” bilinguals — those living in households where two languages are spoken routinely. The researchers speculate that it might be the fact of having to learn two languages in the same setting that requires greater use of executive function. So whether those benefits apply to children who learn one language at home, and one at school, remains unclear.

单选题患者，女，23岁，右下腹痛1月余，常伴有上腹或脐周腹痛，排便每日约2～4次，糊状，不含黏液和脓血，曾作过X线钡剂检查发现回盲部有跳跃征。最可能的诊断是