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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 a nice day. This is Lili’s family. They are having a picnic in the park. The park is very beautiful. The birds are singing in the tree. The fish are swimming in the lake. There are lots of beautiful flowers and tall trees. Her grandpa is playing the suona. Her grandma is dancing. Her father is listening to music. Her mother is reading a book. Lili and her little brother are playing hide-and-seek. They are very happy!

1.Lili is having a picnic in the park. (      )
2.The birds are singing in the tree. (      )
3.Lili’s grandpa is playing the suona. (      )
4.Lili’s mother is riding a bike. (      )
5.They are having a lovely time. (      )
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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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