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:0.85
所属科目:小学英语
听录音,选择你所听到的单词,读三次。
(     ) 1. A. blackboard          B. black                  C. window
(     ) 2. A. near                    B. pear                    C. bear
(     ) 3. A. Coke                  B. candy                 C. cake
(     ) 4. A. notebook             B. storybook            C. maths book
(     ) 5. A. five                    B. nice                    C. nine
(     ) 6. A. kite                    B. key                    C. Kate
(     ) 7. A. floor                  B. friendly               C. queen
(     ) 8. A. right                  B. quiet                  C. light
(     ) 9. A. thin                    B. in                       C. his
(     ) 10. A. help                 B. hat                       C. hope
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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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