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

It’s Sunday today. Bill, Lily and Linda are in the park. Bill is playing with his ball. Lily is flying a kite. What’s Linda doing? She’s reading a book under the tree. What’s that behind Linda? It’s Linda’s pet (宠物) dog, Kaka. It’s sleeping. Look! Some girls are under near the lake. They are taking pictures.

1.Today is Saturday. (      )
2.Bill and lily are playing with a ball. (      )
3.Linda is under the tree. (      )
4.Kaka is sleeping. (      )
5.Linda is taking pictures for some girls. (      )
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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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