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A: Hello, Kangkang. I have just called you, but you weren’t in. 1． ?
B: I have just been to a shopping center with Li Lei. I’ve never been there before, but I don’t want to go there any more.
A: 2． ?
B: Because there were too many people. We got lost and couldn’t find each other.
A: 3． ! Have you found him yet?
B: No, he has probably gone home. Let’s call him up now. I really hate to go to such a place. Let’s go to the Ocean Park next time.
A: 4． !
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
