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At the lost-and-found
A: 1.
B: I lost my schoolbag.
A: 2.
B: It's black and white.
A: 3.
B: At about 4:00 in the afternoon.
A: Where did you lose it?
B: 4.
A: 5.
B: There are many books, my pencil case and my notebooks.
After two minutes…
A: Is this your schoolbag?
B: Yes, it is. Thank you very much.
| A. What colour is it? B. What's the matter? C. What are in it? D. On the playground. E. When did you lose it? |
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
