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B: Yes, I want a hamburger.
A: Anything else? Do you want a hot dog?
B:
A: No, it isn’t.
B: A hot dog for me too.
A:
B: I want to drink a cup of milk.
A: OK. That’s a hamburger, a hot dog and a cup of milk.
B:
A: It’s twenty dollars.
B:
A: Thank you.
| A．How much is it? |
| B．Here you are. |
| C．Can I help you? |
| D．What do you want to drink? |
| E．Is it really a dog? |
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
