学进去-教育应平等而普惠
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类型:填内容补全对话
难度系数:0.40
所属科目:小学英语

I have a g1. friend in my home. It i2. a parrot. It's my favourite a3.. Its name is Polly. It is three years old. A4. it's very beautiful. I often play with it after s5.. Polly is very clever. It can speak words like humans. My classmates, Amy and Kate, often come to s6. it. My grandfather and g7. often talk to it. And Polly sings every day. I teach it to sing the“ABC”. N8. it can sing the “ABC”. We all l9. it very much. D10. you like it?

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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

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2019-09-19

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

用户名称
2019-09-19
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