单选题A huge population of red fire ants has bedeviled Texas farmers for years. By some estimates the insectscost state businesses close to $1 billion a year due to crop and machinery destruction. Killing the ants and their nests has not proven easy. Texas A＆M researchers have discovered that the phorid fly from South America will lay eggs on the red fire ants and the maggots which are hatched eat away at the ant's brains, eventually causing their heads to fall off. Someone at the university was willing to underwrite the work to solve a problem. That investment was almost certainly much less than the $1 billion a year that fire ants cost businesses in the state. A recession does not stop advancements in technology. It just makes companies so frightened of risk that they choose not to make the investment in the red fire ant projects. In the last week, the two most successful technology companies in the world, IBM and Google have announced major new products. IBM released "stream computing" applications that allow businesses to look at and analyze huge amounts of data in real time. The most important product of Google allows the company's customers to take very large amounts of search data and organize it into spreadsheets. These are developments that will probably help the firms take business away from their competitors. The shares of Google and IBM have handily outperformed those of all the other large tech companies based in the U. S. such as Hewlett Packard (HPQ), Microsoft (MSFT), Cisco (CSCO), and Oracle (ORCL). Each of the companies is blessed with substantial earnings and technology staffs in the tens of thousands. But the firms are not all viewed the same, at least by investors who trade tens of millions of their shares each day. In most ways, IBM and Google are not like one another at all. IBM makes its money selling expensive hardware, client services, and software to companies, most of which are very large, and to governments. Google has millions of customers who pay nothing to use its services. It has millions of advertisers who spend money to reach people who look at search results and most of these marketers are very small. What the companies do have in common is a willingness to take risks, probably risks with long odds in order to launch new products. These products may be failures, but they are well enough researched and designed that they have a good chance of keeping IBM and Google ahead of the competition even if that does not immediately involve significant new revenue. The red fire ant problem never goes away. Unsolved problems in every industry cost companies money. Sometimes companies do not even know that their problems can be solved. The phorid fly is an obscure species. So is software that can analyze huge amounts of data in real time.

单选题保留受者下腔静脉的肝移植术式是

单选题A．放射治疗 B．化学治疗C．手术治疗 D．放射治疗+手术治疗E．化学治疗+手术治疗

单选题ARDS的特征性表现

单选题头面、颈部和会阴部烧伤创面的处理宜采用

单选题男性，25岁，车祸伤及右髋部，右髋痛，不敢活动右下肢，有下肢呈屈曲、内收、内旋和短缩畸形。最可能的诊断是A．股骨颈骨折B．股骨转子骨折C．髋关节后脱位D．髋关节前脱位E．股内收肌扭伤

单选题肱骨干中下1／3骨折常并发

单选题A．新生儿阑尾炎B．小儿阑尾炎C．妊娠期阑尾炎D．老年人阑尾炎

单选题脊柱结核合并截瘫，下列治疗中哪项是不恰当的

单选题一病人为自行车撞伤右膝外侧，拍片证实为腓骨小头骨折，检查发现踝关节不能主动背伸，可能并发

单选题上腹部手术后的镇痛对下述哪项最有利

单选题如支气管镜检查发现右上叶前段肿物，活检病理为鳞癌，全身情况良好，无远处转移。应首先采用的治疗方法是

单选题患者因急性肠梗阻开腹探查证实为降结肠肿物所致，发现近端肠管充血水肿严重。下列哪种术式不宜采用( )(2006年)

单选题轻度甲亢的基础代谢率为

单选题判断全麻病人完全清醒的依据是（ ）

单选题胃大部切除术后碱性反流性胃炎，常见于术后（ ）

单选题A．凿开骨皮质，找到脓腔，清除脓液，关闭伤口，可愈合B．立即开放创口引流，全身应用抗生素，石膏固定，开洞换药C．早期进行切开引流术，闭式引流或开放引流D．清除病灶死骨，消灭死腔，一期闭合伤口，接负压引流管E．截肢术

单选题可有效防止术后胆胰液进入残胃的胃大部切除方法是

单选题腰椎问盘突出症的主要临床症状是什么

单选题肾结核的血尿特点大多为