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[[QOrDeR]]你路上碰到你的朋友时，你会说：
| A．Hello! |
| B．How do you do? |
| C．What’s your name? |
| A．This is Anna speaking. |
| B．My name is Anna. |
| C．This is my friend Anna. |
| A．Nice to meet you , too. |
| B．Glad to meet you. |
| C．How old are you ? |
| A．What are you doing here? |
| B．Where are you from? |
| C．Who is he? |
| A．I’m sorry to hear that. |
| B．I don’t know. |
| C．I don’t think so. |
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
