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学进去-教育应平等而普惠
试题
类型:句型转换
难度系数:0.65
所属科目:小学英语
按要求改写句子。
1. Tim usually cooks dinner on Sundays. (用now替换on Sundays)
Tim________ _________dinner now.
2. The children are helping the old woman .(改成一般疑问句)
_____________________________________________?
3. She is closing the door now.(改成否定句)
__________________________________.
4. They are reading in the library . (对划线部分提问)
_______ ________ they ___________?
5. dog, is , jumping, bed, the, on, the (.)(连词成句)
_____________________________________________?
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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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