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。
(       ) 1. A. boy                      B. big                    C. book
(       ) 2. A. father                  B. mother               C. brother
(       ) 3. A. cap                      B. car                      C. Canada
(       ) 4. A. girl                      B. new                    C. friend
(       ) 5. A. on                       B. in                       C. at
(       ) 6. A. twelve                 B. twenty                  C. thirteen
(       ) 7. A. man                    B. pen                      C. map
(       ) 8. A. pear                    B. bear                    C. chair
(       ) 9. A. grandpa               B. green                    C. grape
(       ) 10. A. UK                  B. USA                      C. NBA
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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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