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A: Excuse me, I lost my schoolbag.
B:
A: It’s blue and white.
B:
A: Yes, it is.
B: It’s so heavy.
A: A pencil box, some books and ten notebooks.
B: Ten notebooks?
A: They’re my friend’s notebooks.
B:
A: She’s Amy.
B: Here you are.
A:
| A．What’s in it? |
| B．Who is your friend? |
| C．What colour is it? |
| D．Thank you so much. |
| E．Is this your bag? |
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
