Salesman(售货员): Good morning.
Mary: Good morning. I want to buy a gift for my brother.
Salesman: OK.
Mary: He likes reading books. So I want to buy a book for him.
Salesman: What kind(种类) of books do you want to buy?
Mary:
Salesman: How about this one?
Mary:
Salesman: Fifteen yuan.
Mary: I’ll take it.
Salesman: You’re welcome.
A.What do you want to buy for him? |
B.Thank you. |
C.How much is it? |
D.May I help you? |
E.Story books. |
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同类型试题
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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
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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
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