加油站服务规范要求员工在岗时坐姿要（）。A.端正，不前俯后仰，不东倒西歪，不摇腿翘脚

工程项目设计质量管理的基本要求包括（）。

A.必须符合有关工程建设及质量管理方面的法律、法规

B.必须符合经过批准的工程项目建议书

C.设计图纸要齐全、计算要准确

D.必须符合承包人关于建设的思想、意图

E.必须符合有关工程建设的技术标准和规范

患者男性，76岁，因“双膝疼痛20余年，右膝加重2个月，发现右腘窝肿块”来诊。患者曾经以骨关节炎对症治疗，病情时好时坏。查体：双侧腹股沟淋巴结肿大。X线片：股骨远端不规则溶骨性破坏，无骨膜反应。胸部CT：纵隔淋巴结肿大。

为确诊，进一步应行检查是（）

A.血浆乳酸脱氢酶

B.淋巴结活检

C.骨病灶活检

D.肝肾功能检查

E.PET-CT

F.骨髓穿刺

For more than a decade, the prevailing view of innovation has been that little guys had the edge. Innovation bubbled up from the bottom, from upstarts and insurgents. Big companies didn’t innovate, and government got in the way. In the dominant innovation narrative, venture-backed start-up companies were cast as the nimble winners and large corporations as the sluggish losers.

There was a rich vein of business-school research supporting the notion that innovation comes most naturally from small-scale outsiders. That was the headline point that a generation of business people, venture investors and policy makers took away from Clayton M. Christensen’s 1997 classic, The Innovator’s Dilemma, which examined the process of disruptive change.

But a shift in thinking is under way, driven by altered circumstances. In the United States and abroad, the biggest economic and social challenges—and potential business opportunities—are problems in multifaceted fields like the environment, energy and health care that rely on complex systems.

Solutions won’t come from the next new gadget or clever software, though such innovations will help. Instead, they must plug into a larger network of change shaped by economics, regulation and policy. Progress, experts say, will depend on people in a wide range of disciplines, and collaboration across the public and private sectors.

"These days, more than ever, size matters in the innovation game," said John Kao, a former professor at the Harvard business school and an innovation consultant to governments and corporations. In its economic recovery package, the Obama administration is financing programs to generate innovation with technology in health care and energy. The government will spend billions to accelerate the adoption of electronic patient records to help improve care and curb costs, and billions more to spur the installation of so-called smart grids that use sensors and computerized meters to reduce electricity consumption.

In other developed nations, where energy costs are higher than in the United States, government and corporate projects to cut fuel use and reduce carbon emissions are further along. But the Obama administration is pushing environmental and energy conservation policy more in the direction of Europe and Japan. The change will bolster demand for more efficient and more environmentally friendly systems for managing commuter traffic, food distribution, electric grids and waterways.

These systems are animated by inexpensive sensors and ever-increasing computing power but also require the skills to analyze, model and optimize complex networks, factoring in things as diverse as weather patterns and human behavior. Big companies like General Electric and IBM that employ scientists in many disciplines typically have the skills and scale to tackle such projects.

Due to the complicated circumstances, a single innovation（）

A. will stimulate a chain of other innovations in related fields

B. should fit into a network of changes to become more effective

C. should meet economic challenges to assume social significance

D. can never solve any problem but only serves to complicate it

胃痛多见于

A．贲门

B．胃底

C．胃大弯

D．胃窦部

E．胃体

比较先进的电子政务网站提供基于（）的用户认证机制，用于保障网上办公的信息安全和不可抵赖性。

A.数字证书

B.用户名和密码

C.电子邮件地址

D.SSL