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

This is our new classroom. The windows are white. The blackboard is black. The wall is green. The lights are yellow. The teacher’s desk is orange. The desks and chairs are brown. I love my new classroom.

1.The windows are brown. (      )
2.The blackboard is black. (      )
3.The wall is blue. (      )
4.The teacher’s desk is orange. (      )
5.The desks and chairs are yellow. (      )
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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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