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B:
A: OK, what present do you want?
B: I want a book or a toy. Oh, that looks interesting.
A: It’s $15.99.
B: Hmm, that’s a little expensive(贵的).
A:
B: She likes story books.
A: How about this one?
B:
A: It’s $8. 99.
B: OK,
| A．How much is this toy? |
| B．That looks great. |
| C．I want a birthday present for my friend. |
| D．I’ll take it. |
| E．We have some great books over here. |
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
