学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选择你所听到的句子。(听两遍)
(     ) 1. A. He can jump really far.     B. He has got strong legs.     C. But he didn't have any legs.
(     ) 2. A. There are two beautiful cats on the chair.       B. There were two.       C. There are lots of buses and cars.
(     ) 3. A. How was it different?       B. Life was very different in China many years ago.       C. An old lady talked about her life many years ago.
(     ) 4. A. There weren't any televisions.       B. She didn't have a telephone.       C. I hope you are weli.
(     ) 5. A. We didn't have enough food.       B. We've got lots of food.     C. I miss my grandma.
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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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