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A—Mr. Black B—Shop Assistant
A: Good morning.
B: Good morning. Welcome!
A: Will you show me some T-shirts?
B: Sure.
A: Size fourteen.
B:
A: White.
B: Here you are. This is the best in our shop.
A: Good.
B: Eleven dollars.
A:
B: Here's your change. Thank you.
| A．What size do you want? |
| B．What can I do for you? |
| C．Give me two. |
| D．What about the colour? |
| E．How much is 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
