率先打开日本闭关锁国大门的资本主义国家是:()A.英国 B.法国 C.美国 D.德国

题型:单项选择题

问题:

率先打开日本闭关锁国大门的资本主义国家是:()

A.英国

B.法国

C.美国

D.德国

考点:历史学世界近代史世界近代史题库
题型:单项选择题

如图所示,沿竖直杆以速度v匀速下滑的物体A通过轻质细绳拉光滑水平面上的物体B,细绳与竖直杆间的夹角为θ,则以下说法正确的是

[ ]

A.物体B向右匀速运动

B.物体B向右匀加速运动

C.细绳对A的拉力逐渐变小

D.细绳对B的拉力逐渐变大

题型:单项选择题

________ your daughter often help you ___________ the housework?

A.Do, for

B.Do, with

C.Does, for

D.Does, with

题型:单项选择题

细胞破碎

题型:单项选择题

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

竣工结算的计价形式主要包括()等。

A、成本合同

B、弹性合同

C、总价合同

D、单价合同

E、成本加酬金合同

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