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B: 1． You can go to the second floor.
A: Thank you. 2．
B: It’s 4 p.m. 3． The library is closed at 4:30.
A: OK, thanks. Where are you going?
B: I’m going to the playground. 4．
A: What do you do in class?
B: 5．
| A．We have a PE class. |
| B．Hurry up. |
| C．What time is it now? |
| D．Yes, I do. |
| E．I play football with my friends. |
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
