学进去-教育应平等而普惠
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类型:选内容补全对话
难度系数:0.65
所属科目:小学英语
live, by, he, play, strong

I have a pen friend. 1. name is Peter. He is twelve years old. He is from Australia. He 2. in the country. He is tall and 3.. He can speak English and sing English songs. He likes 4. chess, basketball and computer games. Basketball is his favourite sport. He plays basketball with his classmates after school every day. He often goes to school 5. bike. But he has to go to school by car when he gets up late.

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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

用户名称
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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