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Cashier:
Mr Brown: Yes, please. I want some rice with beef.
Cashier: OK.
Mr Brown: Some juice.
Cashier:
Mrs Brown: Some milk and vegetables.
Cashier: OK. Some rice with beef, juice, vegetables and milk.
Mrs Brown: How much is it?
Cashier:
Mrs Brown: Here you are.
Cashier:
| A．What about you, madam? |
| B．Enjoy your meal! |
| C．Can I help you? |
| D．And to drink? |
| E．Fifteen dollars. |
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
