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M=Mike A=Amy
A: Hello! Mike!
M: Really? What colour is it?
A: Look!
M: Let me see. Oh, it’s heavy.
A: A maths book, a pencil box and some storybooks.
M:
A: I have ten.
M: Haha!
| A．What’s in the schoolbag? |
| B．How many storybooks do you have? |
| C．I have a new schoolbag. |
| D．It’s a fat cat. |
| E．It’s yellow and pink. |
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
