学进去-教育应平等而普惠
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类型:选内容补全对话
难度系数:0.85
所属科目:小学英语

   Yesterday I went to Sam and Amy's 1.. In the UK they don't start school at eight o'clock. They start at nine o'clock. They don't do morning 2. here. They all play on the 3.. I 4. with the girls. The bell 5. at nine o'clock. Then we went into the classroom.

A.playgroundB.rangC.schoolD.exercisesE.skipped
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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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