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学校英语论坛正在举行“An Unforgettable Trip（记一次难忘的旅行）”的征文比赛。请你积极参加，分享你的旅行中乐趣吧。
提示问题：1. Where did you go?
2. When do you go there?3. How did you get there?
4. What did you do there?
5. How did you feel (感受)?
| 发件人 | Studentl@163.com |
| 收件人 | trip@hotmail.com |
| 主题 | An Unforgettable Trip |
| An Unforgettable Trip _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ Wang Ying | |
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
