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　　Mrs. Green is the mother of two children. She is a shop assistant(店员). She is very busy every day. Every morning, she cooks breakfast for her family. She cooks eggs for her daughter and makes bread for her son. At noon she eats hamburgers in her shop. Her children have lunch in the school dining hall.

    In the evening, Mrs. Green gets home very late. When she gets home, her children get ready for dinner. Mr. Green cooks beef noodles for his daughter and cooks carrots for his son. And Mrs. Green usually buys some chicken from the supermarket. It's Mrs. Green's favourite food.

如图，AB是⊙O的直径，C是⊙O上的一点，OD⊥BC于点D，AC=6，则OD的长为（     ）
 

在世界资本主义发展史上，法国曾扮演了重要的角色。阅读下列材料，回答问题：

材料一  启蒙运动对欧洲政治革命的意义……“砸烂可耻的东西”、“自由放任”和“社会契约”这些口号破坏了传统的制度和习俗……它们不仅对法国的现状，而且对整个欧洲甚至海外地区的现状，也是一个挑战。

                                                   ——《全球通史》

材料二  第一条：在权利方面，人们生来而且始终是自由平等的。

第三条：国家主权属于人民。

第六条：法律是公共意志的表现，在法律面前，所有的公民都是平等的。

第十七条：私人财产神圣不可侵犯。

材料三  拿破仑个人的影响诚然是可贵的，但是只有顺应正在推进欧洲文明的那些潮流，他的影响才能起作用。

——《拿破仑时代》

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