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You are sad now.
Zara: I couldn't play in the park last night.
Bob: Oh! That's terrible.
Zara: Because
Bob: Really? I didn't know that at all.
Zara: Em. I see.
Bob: What are you thinking about?
Zara: Nothing. How about going to the park today?
Bob: OK.
| A．I stayed at home all day. |
| B．Why? |
| C．What's the matter with you? |
| D．Let's go. |
| E．there was a heavy rain last night. |
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
