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| A．How much is it? |
| B．Here is the money. |
| C．Anything else? |
| D．Yes. I want a toothbrush. |
| E．No. I want a toothbrush. |
| F．No. Goodbye. |
B: 1. ___________
A: A toothpaste?
B: 2. ___________
A: OK. Here you are.
B: 3. ___________
A: it’s five yuan.
B: 4. ___________
A: Thank you very much. 5. ____________
B: 6. ___________
A: Bye.
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
