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假设你是李华，你的学校在上周五举行了“科学日”（Science Day）活动。你的外国朋友Tom对此很感兴趣并希望了解更多的信息。请你根据以下内容写一封电子邮件
| Science Day | |
| Time | Last Friday |
| Place | The school playground |
| Activities | Science lectures（讲座） |
| Feelings | ... |
1. 可在内容提示的基础上适当拓展信息；
2. 词数80个左右（邮件的开头已给出，不计入词数）；
3. 不能透露学校、姓名等任何个人信息，否则不予评分。
Dear Tom,
How is it going? I am writing to tell you about the Science Day in our school.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
I hope to hear from you soon.
Best wishes,
Li Hua
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
