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

   Sam likes taking pictures. Look at these pictures. This is his father. He's flying a kite. This is his mother. She's eating bananas. This is his grandma. She's sleeping. And this is his sister Amy. She's riding a bike. Look, that's his little brother. He's playing with his toy panda.

1.Sam's father is flying a kite. (____)
2.Sam is taking pictures. (____)
3.Amy is riding a bike. (____)
4.Sam's mother is sleeping. (____)
5.Sam's little brother is playing with his toy car. (____)
6.His grandma is reading a book. (____)
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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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