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写作要点：
1.我对每个人都友善、有礼貌，因此我总是很快乐；
2.我很活跃，每天进行锻炼；
3.我有健康的饮食习惯；
4.我每天都睡眠充足。
Dear Mike,
Thank you for your email. Here is what I do to stay healthy. ______
____________________________________________________________________
____________________________________________________________________
Could you tell me what you do to stay healthy? I'm looking forward to your email.
Best wishes,
Li Ming
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
