写作：

        同学们告别了小学生活，进入了初中的学习阶段。新的生活会让你获得新的感悟，明白新的道理。请你结合自己升入初中以来的生活，以“我懂得了                          ”为题，写一篇记叙文。

        要求：①在“我懂得了”后面的横线上填上恰当的文字，将题目补完整。②除诗歌以外，文体不限，不少于600字。③感情真挚，不得抄袭。④文中不得出现真实的人名、校名和地名。

已知双曲线$C$的方程为$\frac{x^2}{a^2}-\frac{y^2}{b^2}=1\left(a>0,b>0\right)$，它的左、右焦点分别$F_1,F_2$，左右顶点为$A_1,A_2$，过焦点$F_2$先作其渐近线的垂线，垂足为$P$，再作与$x$轴垂直的直线与曲线$C$交于点$Q,R$，若$\left|P{F}_2\right|,\left|A_1{A}_2\right|,\left|Q{F}_1\right|$依次成等差数列，则离心率e=（　　　）

在《论中国与欧洲国体异同》中，梁启超指出，中国周代与古代希腊的国体相似。两者政治上的相似之处应是(      )

    Today is Tom's birthday. After school he walks past the shop on the street corner. He looks into the window. That pair of trainers(运动鞋) is still there. He really wants to have them.

    He is very sad and walks away. He knows his mother can't buy him anything, because his mother has no money. The trainers are too expensive. He doesn't go home at once , because his mother can notice（注意）his worry. So he goes to the park and sits on the grass. Then he sees a boy in a wheelchair(轮椅). He finds that the boy moves(移动) the wheels with his hands. Tom looks at him carefully. The boy has no feet. He looks at his own feet. "It's much better（更好）to be without shoes than (比) without feet." he thinks. There is no reason for him to feel so sorry and sad. He smiles and thinks he is happy.

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