单选题参与原核基因转录激活调节的基本要素不包括

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单选题梗死灶呈地图状的器官是

单选题栓塞后不易导致组织梗死的器官是

单选题Data security used to be all about spending big bucks on firewalls to defend data at the network perimeter and on antivirus software to protect individual computers. Internet-based computing, or cloud computing, has changed all that, at the same time expanding exponentially the chances for data thieves and hackers. The cloud creates other opportunities too. a handful of security vendors now deliver security as a service--a one-two punch of hardware and software that monitors and manages an enterprise's data security and bills customers only for the computing power they use. "For years, security was about big companies pushing technology to their customers," says Qualys CEO and founder Philippe Courtot. "Now it's about the customers pulling precisely what they need and providing them with those resources on demand. " Qualys, a privately held company in Redwood Shores, Calif. , was among the first to embrace the service-oriented model, in 1999. Today four different modules of QualysGuard, its flagship offering, are used by more than 3500 organizations in 85 countries. The company performs more than 200 million security audits per year. Courtot knows something about opportunity. The French entrepreneur arrived in Silicon Valley in 1987 and has built a number of companies into big-time players, including Signio, an electronic-payment start-up that was eventually sold to VeriSign in a combined deal for more than $1 billion. As CEO, he rebuilt Verity and transformed cc:Mail, a once unknown firm of 12 people, into a dominant e-mail platform before Lotus acquired it in 1991. "Throughout my career, I've been able to recognize that for a technology to succeed, it must have a purpose," he says. "Technology itself has no value. It's what you do with it that counts. " Under the old paradigm, according to Courtot, enterprises overspent for stand-alone security devices that became unruly and difficult to operate over the long term He says Qualys attacks the flaws in this strategy by streamlining security and tackling most of the service delivery through the cloud. "We control the infrastructure, software updates, quality assurance and just about everything in between," he says. The firm unveiled QualysGuard in 2000. After an infusion of $ 25 million from the venture firm Trident Capital and another $ 25 million from Gourtot, Qualys tweaked the service to focus mostly on vulnerability management. Much of the company's current revenue-sales, topped $ 50 million last year--is being driving by a set of standards established by the Payment Card Industry Security Standards Council (PCISSC). "The PCI standard has been a major driver of business for all of them, especially Qualys," says Avivah Litan, a vice president and analyst at market-research firm Gartner. "When everyone has to comply, there's a lot of work to go around. /

单选题关于压力感受性反射的叙述，下列哪项不正确?

单选题每搏输出量增大时以下列哪项升高为主( ) A．收缩压 B．舒张压 C．脉压 D．平均动脉压 E．中心静脉压

单选题 G6PD缺乏症患者可放心食用 ( ) A、喹啉类抗疟药 B、黄豆 C、阿司匹林等镇痛解热药 D、磺胺药 E、蚕豆

单选题霍奇金淋巴瘤的组织学特点是（ ）

单选题患者女性，40岁，左侧腰部疼痛1年，尿中带血，时有脓尿，尿中可查见结核菌肾盂造影检查，左肾可见空洞。符合该患者疾病的诊断是

单选题伤寒小结中的伤寒细胞来源于

单选题神经系统活动的基本过程是

单选题脂肪栓塞患者一般的死亡原因是

单选题A．小分子有机化合物B．大分子有机化合物C．电解质D．蛋白质

单选题在摄取混合食物时，其呼吸商通常为

单选题腺鳞癌是指

单选题氨基酰-tRNA合成酶的特点正确的是

单选题在创伤愈合过程中，胶原纤维的分解吸收占优势出现在

单选题A．传音性耳聋B．感音性耳聋C．低频听力受损D．高频听力受损

单选题不参与吞噬细胞识别病原体的因子是