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Xiaohan: 1．
Waiter: Yes.
Xiaohan: 2．
Waite: Three yuan.
Xiaohan: 3．
Waiter: The apples are two yuan.
Xiaohan: OK 4．
Waiter: Here you are.
Xiaohan: Thanks.
Waiter: 5．
| A．How much are they? |
| B．Do you have any hot dogs? |
| C．How much are the apples? |
| D．You’re welcome. |
| E．I’ll take four apples, please. |
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
