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Liu Tao: Hello, Wang Bing. This is Liu Tao.
Wang Bing:
Liu Tao: Not so good.
Wang Bing:
Liu Tao: I have a bad cold.
Wang Bing:
Liu Tao: OK. Thank you.
Wang Bing:
Liu Tao: See you.
| A．Can I come to see you tomorrow? |
| B．How are you now? |
| C．This is Wang Bing speaking. |
| D．Take care. |
| E．What’s the matter with you? |
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
