(5分)右图所示是液态二氧化碳灭火器,请回答下列问题。 ⑴图中所标物质中属于金

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问题:

(5分)右图所示是液态二氧化碳灭火器,请回答下列问题。

⑴图中所标物质中属于金属材料的是_________(只写一种,下同),属于有机材料的是______________。

⑵加压在小钢瓶中液态二氧化碳喷出后能灭火,其原理是______________和__________。

⑶在钢瓶表面涂油漆的作用是_______________________。

考点:燃料的利用和新能源的开发酸雨氢气的性质氢气的用途
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如图所示的局面中魏国都于

三国鼎立示意图

[ ]

A.长安

B.建业

C.成都

D.洛阳

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关联词填空。

1.地球的矿物资源(  )上帝的恩赐,(  )经过几百万年,甚至几亿年的地质变化才形成的。

2.在火星或者月球上建造移民基地的设想(  )能实现,(  )是遥远的事情。

3.(  )地球上的各种资源都枯竭了,我们(  )很难从别的地方得到补充。

4.(  )地球拥有的自然资源是有限的,(  )我们不能不加节制地开采。

5.(  )地球是无私的,它向人类慷慨地提供矿产资源。(  ),如果不加节制地开采,必将加速地球上矿产资源的枯竭。

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如图所示,质量为m的木块A放在斜面体B上,若A和B沿水平方向以相同的速度v0一起向左匀速直线运动,则B对A的作用力大小为(  )

A.0

B.mg

C.mgsinθ

D.mgcosθ

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In business, there’s a speed difference: It’s the difference between how important a firm’s leaders say speed is to their competitive(竞争的) strategy(策略) and how fast the company actually moves.The difference is important regardless of industry and company size. Companies fearful of losing their competitive advantage spend much time and money looking for ways to pick up the speed.

In our study of 343 businesses, the companies that chose to go, go, go to try to gain an edge ended up with lower sales and operating incomes than those that paused at key moments to make sure they were on the right track.What's more, the firms that “slowed down to speed up” improved their top and bottom lines, averaging 40% higher sales and 52% higher operating incomes over a three-year period.

How did they disobey the laws of business physics, taking more time than competitors yet performing better? They thought differently about what “slower” and “faster” mean.Firms sometimes fail to understand the difference between operational speed (moving quickly) and strategic speed (reducing the time it takes to deliver value).Simply increasing the speed of production, for example, may be one way to try to reduce the speed difference.But that often leads to reduced value over time, in the form of lower-quality products and services.

In our study, higher-performing companies with strategic speed always made changes when necessary. They became more open to ideas and discussion.They encouraged new ways of thinking.And they allowed time to look back and learn.By contrast (相比而言), performance suffered at firms that moved fast all the time, paid too much attention to improving efficiency, stuck to tested methods, didn't develop team spirit among their employees, and had little time thinking

about changes.

Strategic speed serves as a kind of leadership.Teams that regularly take time to get things right, rather than plough ahead full bore, are more successful in meeting their business goals.That kind of strategy must come from the top.

小题1:What does the underlined part “gain an edge” in Paragraph 2 mean?

A.Increase the speed.    

B.Reach the limit.

C.Get an advantage.

D.Set a goal.小题2:The underlined part “the laws of business physics” in Paragraph 3 means ________.

A.spending more time and performing worse

B.spending more time and performing better

C.spending less time and performing worse

D.spending less time and performing better小题3:What can we learn from the text?

A.How fast a firm moves depends on how big it is.

B.How competitive a firm is depends on what it produces.

C.Firms guided by strategic speed take time to make necessary changes.

D.Firms guided by operational speed take time to develop necessary team spirit.小题4:Which could be the best title for the text?

A.Improve quality? Serve better.

B.Deliver value? Plough ahead.

C.Reduce time? Move faster.

D.Need speed? Slow down.

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柏恩斯把小组领导分为()

A.放任式

B.专权式

C.民主式

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