搜索
Sue: Hello, I want to buy some pingpong balls. Can you help me?
Clerk: Sure. Do you like these balls or those balls?
Sue: I like these balls. How much are they?
Clerk: They’re 2 dollars each.
Sue: I need three pingpong balls.
Clerk: OK. Here they are.
Sue: Thank you.
Clerk: You’re welcome.
1．What does Sue want to buy?
_________________________
2．Are these balls 3 dollars each?
_________________________
3．How much are the three pingpong balls?
_________________________
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
