（Ⅰ）求f（x）的最小正周期；

（Ⅱ）求f（x）在 $-\frac{\pi }{12},\frac{\pi }{6}$ 上的最大值．

推进供给侧结构性改革，是适应和引领经济发展新常态的重大创新。

当前，中国经济面临的供需关系结构失衡，“供需错位”。一方面，过剩产能制约中国经济转型；另一方面，中国的供给体系总体上高端产品供给不足，因此，推进供给侧结构性改革，才能真正启动内需，打造经济发展的新动力。供给侧结构性改革旨在调整经济结构，实现资源要素最优配置，提高生产力水平，提升经济增长的质量和数量。

供给侧改革是有历史成功先例的，20世纪70—80年代，美、英相继陷入“滞胀”，“里根经济学”和“撒切尔主义”分别采用减税和国企改革等措施帮助经济走出衰退的泥沼，供给经济学坚持“小政府、大市场”、自由竞争和企业家精神的理念，认为经济一般不会发生任何生产过剩的危机，更不可能出现就业不足，因为供给会创造自己的需求。

有学者认为，中国的供给侧结构性改革既要借鉴供给经济学理论，又不能简单照搬别国的成功模式和先例。结合材料，运用真理的相关知识加以说明。

在验证植物光合作用的实验中，下列溶解叶片中的叶绿素的方法中正确的是（　　）

    As a boy I was always small for my age. I was five years younger than one of my brothers and seven years younger than the other. 1, I often felt left out when their friends came over to 2. I was too 3for whatever they were doing and they didn't want me to listen to their conversations either. More often than not I found myself outside playing  4and feeling forgotten.

    I remember one Spring afternoon I felt especially 5as I sat in the yard behind our house. We lived miles from town and I 6saw my own friends outside of school. I 7my brothers laughing from 8the house and felt a single tear coming down my face. At that moment I saw a large brown dog 9me. He was wagging (摇摆) his tail 10. He greeted me like a long lost11, licking (舔) my hand and sitting beside me on the grass,12he didn't know me. I petted and13this four-legged angel (天使). He let me pour out all my troubles and14my deepest thoughts before he kissed me goodbye. I went back inside feeling happy,15that no matter what life might hold I was loved. I16that the dog was sent in that moment of17to remind me just how much I was loved.

    In truth, nothing brings us greater18than knowing we are loved. Knowing we are loved gives us the19to love others as well. It also helps us to be the people the world meant for us to be. Remember how much the world loves you and share your20with the world.

下列史实促进了日本社会性质转变的是（   ）