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Next weekend, there will be a sale on the playground. I will take part in it with my friends Alice and Kelly. I will sell some toy cars, some magazines and a model plane. I love them. They are very interesting. I want more pupils to read them and play with them. So I will sell them. Alice will sell some notebooks and some story books. We both like our toys and books. But we also want to give the money to the poor pupils in the mountains. It will be the first time for us. And Kelly won’t sell anything. How exciting! Oh, I can’t wait.
1．What will there be on the playground next weekend?2．What will Alice sell?
3．What will Kelly sell?
4．What do they want to do with the money?
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
