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学进去-教育应平等而普惠
试题
类型:改错
难度系数:0.64
所属科目:小学英语
找出短文中的八处错误,并改正。
Lucy and Lily are American. They are new in our school. They have nice watchs. Their father and mother buy them in China. They are like the Chinese watches very much. But they don’t look the watches in class. In the morning, they put their watches and go to the school. In the evening, they take off the watches and put them away. They go to bed without their watch. They look after their things very careful.
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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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