学进去-教育应平等而普惠
试题
类型:单词拼写
难度系数:0.65
所属科目:小学英语
首字母填空。
I have a good f1. at school. She is a girl. H2.name is Lucy. She is e3. years old. Her h4. is long. We are in the same grade. But we are not in the same class. She is in Class Four, Grade One. I am in Class T5.. Lucy’s b6. is a student, t7.. His name is Tom. He is a good boy. He is fifteen. We are all good friends.
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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

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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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