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: Good morning. 
: Yes, please. : Look at this red dress. Do you like it?: It’s OK. But I don’t like the colour. Do you have a green one?: Yes. : That’s nice. But it’s too short for my mum.: : It’s pretty. How much is it?: : OK. I’ll take it.: Do you want anything else? : | A．No, thanks. |
| B．It’s 268 yuan. |
| C．Can I help you? |
| D．Here is a green one. |
| E．What about this long one? |
| F．I want to buy a dress for my mother. |
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
