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放学了Binbin和同学们在打扫教室。
Binbin: School is over.
Sarah: OK. The teacher’s desk is dirty.
Zhang Peng: I am tall.
Linda: Let me clean the floor.
Amy: Let me clean the desks and chairs.
John: There are thirty desks and thirty chairs.
Amy: Thank you.
Miss White: Wow!
| A．Let me clean it. |
| B．Let’s clean our classroom. |
| C．Let me help you. |
| D．Let me clean the fans. |
| E．Our classroom is so nice now. |
| F．Can I help you? |
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
