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A: Hi, Linda. I haven’t seen you for days.
B: I was ill last week. I had to stay at home for several days.
A: Oh, I’m sorry to hear that.
B: Yes, I did. I took some medical tests and the doctor told me that I just got a fever.
A: I see. How are you feeling now?
B:
A: I think you’d better take more exercise. By the way, have you ever been to the new sports center?
B: Not yet. What can we do there?
A:
B: Sounds interesting.
A: It’s only 2 kilometers away from here.
B: Great! Let’s go there after school.
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
