关于老年人的蛋白质代谢,说法正确的是()。 A.易发生负氮平衡 B.易发生正氮平衡

题型:单项选择题 A1/A2型题

问题:

关于老年人的蛋白质代谢,说法正确的是()。

A.易发生负氮平衡

B.易发生正氮平衡

C.处于零氮平衡

D.膳食蛋白质难以改变氮平衡

E.罹患消耗性疾病时容易出现正氮平衡

考点:营养(师)不同生理人群营养不同生理人群营养题库
题型:单项选择题 A1/A2型题

制动装置通常包括()。

题型:单项选择题 A1/A2型题

新生儿溶血病发生胆红素脑病(核黄疸)一般在生后()

A.1d内

B.1~2d

C.2~3d

D.2~5d

E.2~7d

题型:单项选择题 A1/A2型题

腹股沟疝修补术最常见的手术并发症是()

A.髂腹下和髂腹股沟神经损伤

B.精索损伤

C.小肠、膀胱损伤

D.渗出血形成阴囊血肿

E.疝复发

题型:单项选择题 A1/A2型题

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.

In the author’s opinion, Obama’s approach to the health and energy problem()

A. is a doomed endeavor at its very beginning

B. typically illustrates the complexity of the situation

C. lacks a proper vision though effective in a short term

D. shows why large organizations are less innovative

题型:单项选择题 A1/A2型题

下列植物属于乔木的植物是()

A、丁香

B、榆叶梅

C、木绣球

D、垂暴109

更多题库