学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.94
所属科目:小学英语
听录音,根据所听内容选择正确答句。(10分)
(    )(1)A.It’s on the Christmas tree. B.They’re under the chair.   C.Yes, there are.
(    )(2)A.No, there aren’t.       B.No, he isn’t.             C.Yes, he does.
(   )(3)A.She’s a writer.  B.She goes to work by car. C.She writes stories at home.
(    )(4)A.He usually plays basketball with his brother.    B.I sometimes go to the cinema. C.I like swimming.
(    ) (5)A.It’s just right.       B.It’s beside the door.     C.Yes, there is.
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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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