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Mum:
Tom: OK, Mum.
Mum: Pass me some eggs, please.
Tom:
Mum: Thanks.
Tom: Can we make a heart(心形) cake?
Mum:
Tom: Great!
Later
Tom: Look! There is a heart cake.
Mum: Wow!
Tom:
| A．Here you are, Mum. |
| B．It’s a nice cake. |
| C．I like it, too. |
| D．I’m making cakes. |
| E．Yes, of course. |
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
