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1．---Help yourself. ---______________( )
| A．Hello! | B．Thank you. |
| C．Here you are. | D．OK. |
| E．Thanks. | |
| A．No, thanks. | B．Here you are. |
| C．Yes, please. | D．Yes, I’d like to. |
| E．Let me try it! | |
| A．Have some cakes, please. | B．Here you are. |
| C．Help yourself. | D．You're welcome. |
| A．Sorry, you can't. | B．Thanks! |
| C．OK. Here you are. | D．That's right. |
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
