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| A. What colour do you want? B. Here you are. C. Can I help you? D. You're welcome. E. How much is it? |
A: 1．
B: Yes, please, I want a sweater.
A: 2．
B: Black.
A Sorry, we don't have any black sweaters, Look at the sweaters. They are very nice, too.
B: 3．
A. 35 dollars.
B. OK. I’ll take it.
A: 4．
B: Thank you.
A: 5．
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
