完形填空

    In our life, we meet quite a lot of people: some just pass by while others can 1 our lives. Miss Bella is such a person. She taught me two years only. 2, she has taught me a lot in many ways.

    Every day she began her classes with a smile and a fresh face. She made me realize that warm3 could change a person. I was shy but I wasn't 4 in her classes at all. She gave lessons in a 5 way from other teachers. We had many 6 to talk about problems in English classes. Miss Bella would thumb up (竖起大拇指) to encourage us 7 someone had great ideas. Now, I 8 that I have learned much from her classes. Learning to speak out your ideas is so9 in society. She also made me realize that I could be myself by showing opinions10. Her encouragement not only turned me into a confident student, but will also lead me to a successful life.

中央集权封建君主制度对中国政治形成了长期的影响。下列史实描述正确的有（    ）

①秦始皇确立了中央集权官僚制度

②汉武帝通过颁布推恩令等措施加强中央集权

③唐朝建立三省六部制完善中央集权制

④辛亥革命推翻了中国两千多年的封建君主专制制度

长方形的周长为24cm，其中一边为xcm（其中x＞0），面积为ycm²，则这样的长方形中y与x的关系可以写为（   ）