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
选出与其他两个不同类的单词。
(______) 1. A. yellow        B. green           C. pencil
(______) 2. A. eraser           B. ruler           C. black
(______) 3. A. purple           B. pink           C. pen
(______) 4. A. book           B. orange          C. red
(______) 5. A. school           B. pink           C. brown
(______) 6. A. ear           B. face           C. white
(______) 7. A. brown           B. bag           C. yellow
(______) 8. A. blue           B. finger           C. red
(______) 9. A. hand             B. leg           C. goodbye
(______) 10. A. face           B. name           C. head
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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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