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学进去-教育应平等而普惠
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类型:任务型阅读
难度系数:0.65
所属科目:小学英语

Hello, everyone. I’m Lily, your TV reporter. Today, we visit Wang Li’s family. The Spring Festival is coming. Everyone is so busy. Look, Wang Li’s mum is making jiaozi. Wang Li’s dad is cleaning the windows. Her grandma is making flowers. What is Wang Li doing? She is cooking fish.

1.Wang Li’s parents are busy. (        )
2.Wang Li’s mum is cleaning the windows. (        )
3.Lily is making jiaozi. (        )
4.Wang Li’s grandma is making flowers. (        )
5.Wang Li is a reporter. (        )
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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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