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75. 成长中每个人都要面对烦恼，并解决问题。假设你叫刘明，是美国中学生爱莉丝的朋友。你受到她的电子邮件，请给她回复，回答她的问题，提出你的建议，并就此事谈谈你的看法。
| Hi! Liu Ming, I’m so sad. Angela is a close friend of mine. This morning she wanted to borrow some money from me. If I lend her the money , I’m afraid she won’t pay me back. I don’t know what to do. Do you have the same problem? I need your help. Yours, Alice |
| Hi! Alice, I’m glad to hearing from you.____________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ I hope what I said…. Yours, Liu 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
