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:0.65
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. How was it different?               B. How about now?                    C. There were two.
( ) 2. A. I watch TV every day.               B. Yesterday I watched TV.          C. Come and watch!
( ) 3. A. I miss my grandma.                  B. China is changing.                  C. I miss China.
( ) 4. A. There weren't many buses.     B. There are lots of buses and cars.     C. There weren't any televisions.
( ) 5. A. We lived in a small house.          B. We live in a big house.             C. Now there is a big house.
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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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