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书写要求：
1. 字迹工整，卷面干净整洁。
2. 书写单词时，每个字母的占格规范，字母与字母之间的间隔要均匀、适当，不要凑得太紧，也不要离得太远。
3. 书写句子时，单词之间必须有适当的距离，句子首字母大写，标点符号要写在一定的位置上。
I believe, there is a person who brings sunshine into your life. That person may have enough to spread around. But if you really have to wait for someone to bring you the sun and give you a good feeling, then you may have to wait a long time.
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
