题干

给你如图所示的器材,其中A和B是由同种材料制成的均匀圆柱体,C是泡沫塑料,请你设计一个实验,探究压力作用的效果与受力面积的关系,要求写出实验步骤(用简图说明也可以)、现象和结论.

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解:实验步骤:(1)将大圆柱体放在泡沫塑料上,然后将小圆柱体竖直放在大圆柱体的正上方,观察泡沫塑料被压下的深浅程度;(2)再将小圆柱体放在泡沫塑料上,然后将大圆柱体竖直放在小圆柱体的正上方,再次观察泡沫塑料被压下的深浅程度.

现象:比较两次泡沫塑料被压下的深浅程度,第一次较浅,第二次较深.

结论:在压力相同时,受力面积越小,压力的作用效果越明显.

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阅读理解

    Some people think the government should move the big companies and factories in cities to the countryside. To what extent do you agree?

    Due to the increased urbanization, there appears a bunch of heated social problems. Some people have noticed that there are many big companies and factories in the city and they believe that moving those big companies and factories into countryside could be a good way to solve many of the city problems, such as traffic issues and housing problems. However, I hold an opposite opinion to them and I will explain it as below.

    Cities have much more advantages than countryside. There are more cinemas, restaurants and shopping malls in cities, let alone better education and health care. Living in cities makes life more convenient and enjoyable. Thus not everyone is willing to move to countryside in spite of their companies' moving. They have got cars, which transfers them easily between work and home. Therefore, the pressure of traffic will not be released due to such solution. As for the available empty places spared by the big companies, the newest small companies will take good care of them—with the realization of the benefits that running a business in cities will bring to them. In other words, situation of housing will not be improved much.

    Besides, there will be more problems if big companies and factories move out. Where there are big companies and factories, there will be cities sooner or later. Consequently, countryside is to be disappearing. What's more, industrial pollution is not an easily mended problem.

    In conclusion, moving big companies and factories out of cities is never a final solution. It tackles(解决) no problem but causes lots of them. Just imagine. The traffic is still terrible, and there is no more scenic countryside. We should look into other ways to solve the problems.