阅读材料，完成下列要求。

材料：西方学者尼尔·弗格森指出，代议制政府、自由市场、法治和公民社会，这些原本是西欧和北美社会的四大支柱。在这些代表政治、经济、法律、社会的支柱内部，有着高度复杂且互相关联的制度在发挥着作用。正是因为这些制度优势，使得西方社会在公元16世纪后在世界上独领风骚。然而，20世纪后这些制度的衰退令人扼碗，使西方世界像明清时期的中国那样，正在走向沉沦。

——据尼尔·弗格森著《西方的衰落》改编

结合材料与所学世界史的相关知识，围绕“制度建设与社会发展”拟定一个具体的论题，并就所拟论题进行简要阐述（要求：明确写出所拟论题，阐述须有史实依据）。

下列各种生活中常见的物品中，不属于有机高分子合成材料的是(   )

为了研究滑块的运动，选用滑块、钩码、纸带、毫米刻度尺、带滑轮的木板以及由漏斗和细线构成的单摆等组成如图甲所示装置，实验中，滑块在钩码作用下拖动纸带做匀加速直线运动，同时让单摆垂直于纸带运动方向做小摆幅摆动，漏斗可以漏出很细的有色液体，在纸带上留下的痕迹记录了漏斗在不同时刻的位置，如图乙所示．

Ⅰ．漏斗和细线构成的单摆在该实验中所起的作用与下列哪个仪器相同？____（填写仪器序号）．

A．打点计时器   B．秒表    C．天平

Ⅱ．已知单摆周期T=2s，在图乙中AB=24.10cm，BC=27.90cm、CD=31.80cm、DE=35.50cm，则单摆在经过D点时，滑块的瞬时速度为v_D=____m/s，滑块的加速度为a=____m/s²（结果保留两位有效数字）

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1每处错误及其修改均仅限一词；

2只允许修改10处，多者(从第11处起)不计分。

Withthe growing popularity of the Internet, more and more children are addicted toplay online games day and night. It does harm not only to their health,especial to their eyes, but also to their studies.

Comparingwith online games, many traditional games, like hide­and­seek, benefits kidsmentally and physically. They were ever popular to several generations, whichnot only learned something valuable but also had fun playing the games.Therefore, the games are dying away now.

Personally,I think teachers and parents should take measure to limit their children'sInternet time. Let children to know the harm of online games and the benefitsof traditional games. Help children judge the healthy and unhealthy games.What's more, we should often organize events for children in which traditionalgames played.