在电缆型号中,导体材料为铝时,其表示字母可省略。

题型:判断题

问题:

在电缆型号中,导体材料为铝时,其表示字母可省略。

考点:电工进网证考试电工进网证(特种电缆)电工进网证(特种电缆)题库
题型:判断题

阅读下列材料

“钟山风雨起苍黄,百万雄师过大江。虎踞龙盘今胜昔,天翻地覆概而慷。宜将剩勇追穷寇,不可沽名学霸王。天若有情天亦老,人间正道是沧桑。”

请回答:

(1)这首诗是谁写的?(2分)材料中的“大江”指哪条江?(2分)

(2)“百万雄师过大江”指的是什么战役?(2分)

(3)宜将剩勇追穷寇,不可沽名学霸王”表达了毛 * * 怎样的革命思想?(4分)

题型:判断题

科学技术是人类文明的标志,下列选项不能说明这一点的是 [ ]

A.科学技术的进步和普及为人类创造了巨大的精神财富

B.人类通过广播、电视、电影、网络等科学技术传播思想文化,丰富人们的精神生活,更新人们的思想观念 

C.科学技术进步和发展促进了工业、农业劳动生产率的大幅度提高,有力地带动了整个国民经济的发展 

D.科学技术的进步和普及促进了社会主义精神文明建设 

题型:判断题

生物性危害是指致病菌和寄生虫两方面的危害。

题型:判断题

发病率最高的小儿腹股沟疝是()。

A.双侧腹股沟直疝

B.右侧腹股沟斜疝

C.左侧腹股沟斜疝

D.单侧腹股沟直疝

E.股疝

题型:判断题

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.

Big companies have the advantage of()

A. making Complex networks work in a coordinated way

B. reducing the cost by producing things in large quantities

C. being able to integrate innovations across complex systems

D. controlling human behavior with imposed restraints on creativity

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