单选题判断口对口人工呼吸效果正确的依据是（ ）

单选题 关于植皮治疗小腿慢性溃疡不正确的措施是（ ） A、深溃疡选用肌瓣移植 B、彻底清除局部坏死组织 C、石膏托功能位固定 D、肉芽创面上中厚皮片移植 E、局部应用抗生素

单选题男婴，1岁。突然哭闹，排血便36小时。查体：一般情况好，右上腹可扪及腊肠样肿物。经X线低压空气灌肠复位后，患儿仍阵发性哭闹，面色苍白，发作间歇期比入院前缩短。最佳的治疗方案是

单选题 下列关于环氧合酶说法不正确的是：( ) A、催化花生四烯酸氧化反应生成白三烯 B、环氧化酶-1存在于所有组织中 C、环氧化酶-2是一种诱导酶 D、在细胞分化过程中受细胞因子或激素作用而显著上调 E、催化花生四烯酸氧化反应生成前列腺素

单选题尿毒症最常见的死亡原因是

单选题慢性尿毒症时，常有以下改变A．代谢性酸中毒B．高钙血症C．贫血D．低磷血症

单选题术后急性胃扩张的主要特征是（ ）

单选题微循环血量占总循环血量的

单选题女性，63岁，间断腹痛，恶心、呕吐胃内容物3天，有宿食，考虑患者此时

单选题People can get emotional about immigration. Bill O'Reilly, a talk-show host, devoted a recent segment to the story of an illegal alien who got drunk and accidentally killed two attractive white girls with his car. If only he had been deported for previous misdemeanours, Mr. O'Reilly raged, those girls would still be alive. Another talk-show host, Geraldo Rivera, during an on-air shout-joust(争吵) with Mr. O' Reilly, denounced his demagogic choice of story-angle as" a sin". President George Bush tried again this week to bring a more rational tone to the debate. He urged the new Democratic Congress to revive the immigration reforms that the old Republican Congress killed last year. His proposal was broadly the same as before. He said he wanted to make it harder to enter America illegally, but easier to do so legally, and to offer a path to citizenship for the estimated 12m illegals who have already snuck in. The first part faces few political hurdles and is already well under way. Mr. Bush expects to have doubled the number of Border Patrol agents by the end of next year. The new recruits are being trained. And to defend against the invading legions of would-be gardeners and hotel cleaners, the frontier is also equipped with high-tech military gizmos(小发明), such as unmanned spy planes with infra-red(红外) cameras. This may be having some effect. Mr. Bush boasted that the number of people caught sneaking over the border had fallen by nearly 30% this year. And the controversial part of Mr. Bush's immigration package--allowing more immigrants in and offering those already in America a chance to become legal -- is still just a plan. House Republicans squashed it last year. Mr. Bush senses a second chance with the new Democratic Congress, but Democrats, like Republicans, are split on the issue. Some, notably Ted Kennedy, think America should embrace hard- working migrants. Others fret that hard-working migrants will undercut the wages of the native-born. Mr. Bush would like to see the pro-immigrant wings of both parties work together to give him a bill he can sign. The Senate is expected to squeeze in a debate next month. The administration is trying to entice law-and-order Republicans on board; a recent leaked memo talked of substantial fines for illegals before they can become legal and" much bigger" fines for employers who hire them before they do. The biggest hurdle, however, may be the Democrats' reluctance to co-operate with Mr. Bush. Some figure that, rather than letting their hated adversary share the credit for fixing the immigration system, they should stall until a Democrat is in the White House and then take it all. So there is a selfish as well as a moral argument for making a deal.

单选题有关肾外伤的治疗，下列哪项是不恰当的

单选题慢性肾炎的主要病理类型有

单选题A．1.27～2.35kPa B．2.94kPaC．2.94～4.90kPa D．2.45kPaE．1.76kPa

单选题鉴别胰头癌与胆总管结石的主要依据是

单选题尿道球部损伤常出现的症状是

单选题 植入过程中发生的变化有（ ） A、透明带于受精后第7天溶解消失 B、滋养层细胞增生并分化为两层细胞 C、外层较厚，称细胞滋养层 D、内层细胞界限清楚，称合体滋养层 E、细胞滋养层中出现滋养层陷窝，内含母体血液

单选题心脏复苏时，关于心脏用药以下哪些是正确的

单选题不应再次手术的胃大部切除术后并发症是

单选题男，18岁，淹溺后呼吸心跳停止8分钟，心肺复苏后3天出现呼吸困难，气促，烦躁，面罩吸氧不能缓解。症状进行性加重，体温37．4℃，呼吸42次／分，心率120次／分，心律齐，双肺可闻及干啰音，胸片显示斑片状阴影，血压100／70mmHg，血气分析PaO 2 50mmHg，PaCO 2 30mmHg，氧合指数(PaO 2 ／FiO 2 )180mmHg。

单选题A．颈动脉瘤 B．锁骨下动脉瘤C．腋动脉瘤 D．腹主动脉瘤