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.

将m mol A 与n mol B 充入一密闭容器中，发生反应如下：m A(g) + n B(g)p C(g)；△H = a kJ/mol ( a<0)；若在恒温、恒容下达到平衡时A的转化率为A₁% ；在绝热、恒容条件下达到平衡时A的转化率为A₂%，则A₁和A₂的关系为（      ）