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假如你是张华，以下是你友好结对学校Maple Knoll High School的好友Andrew发给你的一封电子邮件，请你根据该邮件内容给Andrew回复并提出你自己的问题。
| Hi, Zhang Hua, How’s it going? I’m glad that we will graduate soon. As you know, a new life in senior high school will be exciting. Maybe both of us will have many tasks ahead. I wonder if you have any ideas about it. Here are my problems. How can I relax and keep healthy? How can I increase knowledge? Looking forward to your reply. Best wishes! Yours, Andrew |
（2）邮件中不得出现真实人名和校名等相关信息。
（3）词数：80~100。
（4）短文开头仅供选择使用，不计入总词数。
| Subject: To prepare for senior high school |
| From: Zhang Hua |
| To: Andrew |
Hi, Andrew, glad to hear from you. It’s important for us to prepare for senior high school. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Yours, Zhang 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
