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B: Sorry, you can’t. The sweets are bad for your teeth.
A: OK. What are you doing now?
B:
A: Wow! I like dumplings.
B: Can you go to buy some bananas?
A:
C: Can I help you?
A: I want some bananas.
C: Twelve yuan for eight.
A: Eight, please.
C:
A: Thank you.
| A．I’m making dumplings. |
| B．How much is it? |
| C．Can I have some sweets? |
| D．Here you are. |
| E．Yes, of course. |
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
