学进去-教育应平等而普惠
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类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听音,选出你所听到的单词,将其序号写在括号里,每小题听两遍。
(      ) 1. A. ruler       B. eraser C. body
(      ) 2. A. blue                           B. green                            C. white
(      ) 3. A. pencil                     B. pen                            C. book
(      ) 4. A. brown                     B. red                            C. yellow
(      ) 5. A. leg                            B. mouth                     C. arm
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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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