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
找出每组词中不同种类的单词。
(____) 1. A. lion     B. tiger     C. pear
(____) 2. A. Sam     B. zoo     C. Amy
(____) 3. A. tree     B. apple     C. peach
(____) 4. A. seven     B. sixteen     C. lunch
(____) 5. A. book     B. toy     C. pen
(____) 6. A. where     B. how     C. long
(____) 7. A. farm     B. school     C. fruit
(____) 8. A. park     B. naughty     C. loud
(____) 9. A. cake     B. bread     C. pear
(____) 10. A. teacher     B. farmer     C. thirteen
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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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