中共十五大报告指出：“一个世纪以来，中国人民在前进道路上经历了三次历史性的巨大变化。”这三次历史性变化是
①辛亥革命推翻了君主专制制度②中华人民共和国的成立和社会主义制度的建立

③香港回归，洗雪了中华民族百年耻辱④改革开放，为实现社会主义现代化而奋斗

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   Another useful site is www.nutsandboltsguide.com. It has been specifically designed to help you with every step of writing. This site is a must-visit for all those who want to become a writer. It not only talks about different kinds of writing but also discusses a lot about grammar. I’m sure that this site will help you with your writing skills and different writing styles with its sound tips. So get connected and log in to play. Happy surfing!

南朝《西洲曲》中说：“采莲南塘秋，莲花过人头，低头弄莲子，莲子清如水．”你认为这符合对我国四大地理区域中（　　）的农村生活场景的描写．

如图所示，灯泡L标有“6V 6W”字样（灯泡电阻不受温度影响），滑动变阻器的最大阻值为12Ω，电源电压为6V保持不变．