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Mum: I'm looking at my old photos.
Li Hua:
Mum: OK. Here you are.
Li Hua: Look at this photo. Were you at Tian'anmen Square?
Mum:
Li Hua: What happened?
Mum:
Li Hua: Who took this photo?
Mum:
Li Hua: You are great!
| A．A boy couldn't find his mother. |
| B．A young lady took this photo. |
| C．What are you doing, Mum? |
| D．Yes, I went there with my friends. |
| E．May I have a look at it? |
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
