学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.65
所属科目:小学英语
你问我答,选—选。(把正确的序号写在横线上)
1.A:What colour is your pencil box?  B.__________
①It's blue.    ②It's a window.
2.A:How many rulers do you have?    B:___________
①Nine crayons.    ②Nine rulers.
3.A:What's this?    B:___________
①It's "M".    ②Oh, yes.
4.A:It's "Y".    B:___________
①No, it's  "V".    ②Open it, please.
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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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