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在八年级即将结束之际，你们班将举行一次主题班会，要求同学们谈谈一年来自己的收获与变化。请准备一份90词左右的演讲稿，具体内容如下：
| 过去 | 现在 | |
| 学习 | 很少阅读 | 读书使我放松…… |
| 环保 | 随处乱抛垃圾 | 意识到环保的重要性，垃圾入桶 |
| 礼仪 | 大声喧哗，插队推挤 | 举止礼貌，主动让座 |
| 爱心 | 不知道关心他人 | 自由发挥1—2点 |
Hello, everyone. Back to the life in the past year, I think I have changed a lot and made great progress in many ways.
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I'm sure I will do better and better in Grade 9. Thanks for listening!
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
