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Little boy: Mum, what’s this?
Mum:
Little boy: A grapefruit? It’s so big.
Mum: Yes. But not these. We’ll buy one in the shop.
Little boy:
Mum: It’s a coconut.
Little boy:
Mum: Yes, I’ll buy one for you.
Little boy:
| A．Can I have one? |
| B．Thank you, Mum. |
| C．What’s that, Mum? |
| D．It’s a grapefruit. |
| E．Is it yummy? |
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
