学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.65
所属科目:小学英语
听录音,选出你所听到的句子,录音读两遍。
_____) 1. A. Sit down, please.                     B. Stand up, please.
_____) 2. A. Point to the bird.                     B. Point to the blackboard.
_____) 3. A. It's a window.                       B. Point to the window.
_____) 4. A. Hello, Bird!                         B. Hello, boys
_____) 5. A. And point to“hi”!                   B. And point to “I”!
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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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