搜索
B: I want to buy my son a pair of sports shoes for his birthday.
A:
B: It’s next Friday.
A: Oh, it’s January 29th.
B: Thirteen.
A: We have some great sports shoes here.
B: He likes white best.
A: How about this pair? They are nice and cheap.
B: Let me see. They look good. How much are they?
A:
B: OK. I will take them.
| A．Excuse me. |
| B．What’s his age? |
| C．It’s 40 dollars. |
| D．Can I help you? |
| E．What color does he like? |
| F．When is his birthday? |
| G．They are 50 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
