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Jack: Hello, this is Jack!
Zhang Peng: This is Zhang Peng. _________________________________________
Jack: I am sorry. He is busy now. please hold on.
Zhang Peng: _______________________________________________
Jack : He is writing an e-mail. He is coming.
Zhang Peng: Hi, John! ________________________________________.
John: I go to the playground at 7:00 in the morning.
Zhang Peng: It is early. __________________________________________
John: I get up at 6:00.
Zhang Peng: Shall we meet at 6:50 at school?
John: ___________________________________________
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
