学进去-教育应平等而普惠
试题
类型:选词/短语填空
难度系数:0.65
所属科目:小学英语
A. How many     B. What     C. Where     D. Who     E. What colour

1.—______ is the boy?   —He’s my brother.
2.—______ are the shoes?   —They are brown.
3.—______ are the glasses?   —They are near the phone.
4.—______ people are there in your family?   —Three.
5.—______ is her name?   —Her name is Lucy.
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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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