搜索
[[QOrDeR]]当你见到你的朋友们也在逛街的时候，你会说：
| A．How are you? |
| B．Hello, everyone. |
| C．Nice to meet you! |
| A．OK. Let’s go! |
| B．Thank you ! |
| C．You’re welcome. |
| A．She is cleaning the room. |
| B．He is watching the games. |
| C．I am playing the basketball. |
| A．You can see some boys. |
| B．Look at those boys. |
| C．There are boys. |
| A．What is he doing? |
| B．What is she doing? |
| C．What are you doing? |
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
