单选题 关于环丙孕酮药理作用，错误的是：( ) A、与二氢睾酮竞争性结合雄激素受体 B、抑制雄激素的作用 C、可使血浆LH、FSH浓度下降75/%，血浆睾酮下降50/% D、可降低性欲及性功能，并抑制性腺功能 E、具有孕激素样活性

单选题女，15岁，左股骨下端胀痛1个月余，活动后加重。X线平片示左股骨下端有边界不清的骨质破坏区，骨膜增生呈日光放射状改变，血沉加快，最可能的诊断是

单选题手术病人一般在术前8～12小时开始禁食的目的是

单选题A．创伤性关节炎B．骨筋膜室综合征C．外伤性移位D．关节僵硬E．关节积液

单选题为避免手术后病变复发或扩散，手术前抗结核治疗至少需要（ ）

单选题女性，咽痛3天后出现洗肉水样尿，伴乏力，无水肿。

单选题胃网膜左动脉源于

单选题A．B超 B．CT C．泌尿系统平片 D．静脉尿路造影

单选题成人腹股沟斜疝的发病机制不包括

单选题下述哪几项不符合脊柱脊髓损伤的规律

单选题关于肩关节脱位的叙述，下列哪项不正确

单选题关于麻醉前用药的目的，不正确的是

单选题有关上尿结石的临床表现下列哪项是不对的

单选题A．肝 B．肾C．脾 D．小肠

单选题下列关于骶管麻醉的叙述，不正确的是

单选题下列哪些属于肾性骨营养不良症

单选题"This is a really exciting time—a new era is starting," says Peter Bazalgette, the chief creative officer of Endemol, the television company behind "Big Brother" and other popular shows. He is referring to the upsurge of interest in mobile television, a nascent industry at the intersection of telecoms and media which offers new opportunities to device-makers, content producers and mobile- network operators. And he is far from alone in his enthusiasm. Already, many mobile operators offer a selection of television channels or individual shows, which are " streamed" across their third-generation (3G) networks. In South Korea, television is also sent to mobile phones via satellite and terrestrial broadcast networks, which is far more efficient than sending video across mobile networks; similar broadcasts will begin in Japan in April. In Europe, the Italian arm of 3, a mobile operator, recently acquired Canale 7, a television channel, with a view to launching mobile-TV broadcasts in Italy in the second half of 2006. Similar mobile-TV networks will also be built in Finland and America, and are being tested in many other countries. Meanwhile, Apple Computer, which launched a video-capable version of its iPod portable music-player in October, is striking deals with television networks to expand the range of shows that can be purchased for viewing on the device, including "Lost", "Desperate Housewives" and "Law Order". TiVo, maker of the pioneering personal video recorder (PVR), says it plans to enable subscribers to download recorded shows on to iPods and other portable devices for viewing on the move. And mobile TV was one of the big trends at the world's largest technology fair, the Consumer Electronics Show, which took place in Las Vegas this week. Despite all this activity, however, the prospects for mobile TV are unclear. For a start, nobody really knows if consumers will pay for it, though surveys suggest they like the idea. Informa, a consultancy, says there will be 125 million mobile-TV users by 2010. But many other mobile technologies inspired high hopes and then failed to live up to expectations. And even if people do want TV on the move, there is further uncertainty in three areas: technology, business models and the content itself.

单选题关于胸腺瘤，下列哪项不正确

单选题关于腹外疝正确的是

单选题A、脑脊液漏长期不愈B、前颅窝骨折C、颅骨线形骨折D、颅骨凹陷型骨折E、耳道流出血性脑脊液