学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.85
所属科目:小学英语
cleaned, younger, at, were, visited, looks, cooked, do, took, than

Look 1. this photo. The woman in a black dress is my mother. The woman in a white skirt is my aunt. This old man is my grandfather. And this old woman is my grandmother. My mother is 2. than my aunt. But my aunt 3. younger. And my aunt is taller 4. my mother. Last weekend, my mother and my aunt 5. my grandparents. They helped my grandparents 6. the housework. My mother 7. the room. My aunt 8. good food for them. After lunch, they 9. pictures. They 10. very happy.

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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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