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Children: All right.
Mum: Open the window, Lily.
Lily: OK, Mum.
Mum: Clean the table and chairs, Tom.
Tom: Yes, Mum.
Mun: What’s that on the floor (在地板上)?
Lily: It’s a rubber.
Mum: Pick it up (捡起它), Lily.
Lily: Yes, Mum.
Mum: Now the room is very clean and tidy.
1．Lily and Tom clean the classroom.
2．Lily opens the door.
3．Mum cleans the table and chairs.
4．Tom picks up the rubber.
5．The living room is very clean and tidy now.
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
