单选题核酸类型为DNA的病毒是
单选题哪一项不是肝硬化代偿期的表现( )(2001年)
单选题A．内分泌紊乱B．浸润转移C．两者皆有D．两者皆无
单选题A．限制性通气功能障碍B．弥散功能降低C．两者均可有D．两者均可无
单选题女性，咽痛3天后出现洗肉水样尿，伴乏力，无水肿。
单选题符合心脏压塞特点的是
单选题
A.硫酸钠导泻
B.硫酸镁导泻
C.两者均可
D.两者均不可
单选题A．肺泡炎B．支气管炎C．两者皆有D．两者皆无
单选题临床上出现舒张期心力衰竭最常见的疾病是( )(2012年)
单选题支气管哮喘治疗最有效的方法是
单选题下列类风湿关节炎的关节X线检查的结果属Ⅱ期的特点是
单选题下列关于缺铁性贫血描述不正确的是
单选题男性，34岁，1月来感乏力，伴双下肢瘀点。化验血Hb57g/L，WBC2．9×10
9
/L，Plt4．8×10
6
/L，骨髓穿刺检查示：增生明显活跃，原始细胞≥30％，糖原染色（+），Auer小体（一）。
单选题下列选项中关于室性早搏不正确的是
单选题A．肥厚性心肌病B．冠心病C．心房颤动D．急性高血压
单选题男性，24岁，高热3天，咳嗽，咳铁锈色痰，血白细胞增高，胸片呈右上叶片状阴影，正确选用抗生素为A．青霉素B．青霉素+链霉素C．青霉素+庆大霉素D．先锋VE．先锋V+阿米卡星
单选题A．氨基甲酸血红蛋白B．碳酸氢根C．二二者均有D．二者均无 (2002年)
单选题关于二尖瓣狭窄伴主动脉瓣关闭不全，下列哪项不正确A．是风湿性心脏病的常见组合形式B．由于二尖瓣狭窄致心排血量减少，使左心室扩大延缓C．约2/3患严重二尖瓣狭窄的病人可伴有不同程度的主动脉瓣关闭不全D．心排血量增加可使外周血管征缺如E．心尖部第一心音可不亢进
单选题Our ape-men forefathers had no obvious natural weapons in the struggle for (1) in the open. They had neither the powerful teeth nor the strong claws of the big cats. They could not (2) with the bear, whose strength, speed and claws (3) an impressive " small fire" weaponry. They could not even defend themselves (4) running swiftly like the horses, zebras or small animals. If the ape-men had attempted to compete on those terms in the open, they would have been (5) to failure and extinction. But they were (6) with enormous concealed advantages of a kind not possessed by any of their competitors. In the search (7) the pickings of the forest, the ape-men had (8) efficient stereoscopic vision and a sense of color that the animals of the grasslands did not (9) . The ability to see clearly at close range permitted the ape-men to study practical problems in a way that lay far (10) the reach of the original inhabitants of the grassland. Good long-distance sight was (11) another matter. Lack of long-distance vision had not been a problem for forest-dwelling apes and monkeys because the (12) the viewpoint, the greater the range of sight-so (13) they had had to do was climb a tree. Out in the open, however, this simple solution was not (14) . Climbing a hill would have helped, but in many places the ground was flat. The ape-men (15) the only possible solution. They reared up as high as possible on their hind limbs and began to walk (16) . This vital change of physical position brought about considerable disadvantages. It was extremely unstable and it meant that the already slow ape-men became (17) still. (18) , they persevered and their bone structure gradually became (19) to the new, unstable position that (20) them the name Homo erectus, upright man.
单选题A．成年人多见B．好发于婴幼儿，青少年C．无年龄限制D．好发于老年人