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Lisa: I can clean the windows and make the bed. What about you, Tom?
Tom: I can cook the meal and water the flowers. Can you sweep the floor?
Lisa: Yes, of course. I often help my mom sweep the floor.
Mary: No, I can't. But I can do the dishes and wash the clothes.
Tom: We are all helpful at home.
1．Lisa can clean the windows, make the bed and sweep the floor.
2．Tom can do the dishes.
3．Lisa can't sweep the floor.
4．Mary can't sweep the floor.
5．Mary can do the dishes and wash the clothes.
6．Mary, Lisa and Tom are all helpful at home.
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
