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Miss White: Hello.
Liu Yun: Hello. This is Liu Yun speaking. I can’t go to the party.
Miss White: I’m sorry to hear that.
Liu Yun: I have a sore throat.
Miss White: I hope you will get better soon.
Liu Yun: Thank you.
Miss White: Yes. They’re all having fun.
Liu Yun: I want to come, too.
Miss White: Don’t be sad. We will give you a surprise.
Liu Yun: Really?
Miss White: Just wait and see. Get well soon.
Liu Yun: Thank you again and say hello to my friends. Bye.
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
