搜索
1．当你在路上碰到你的朋友时，你该说：_________ ( )
| A．Nice to meet you, too. | B．How do you do? | C．Hello! |
| A．You’re welcome. | B．Thank you! | C．Good morning. |
| A．This way, please. | B．Not at all. | C．I’m sorry. |
| A．This is Li Lei. | B．He is Li Lei. | C．I’m Li Lei. |
| A．That’s great! | B．Look! | C．Yes. |
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
