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:0.65
所属科目:小学英语
听录音,选出你所听到的单词。
(      ) 1. A. ball                   B. beautiful                    C. big
(      ) 2. A. clever                    B. Canada                    C. cap
(      ) 3. A. giraffe             B. girl                           C. gorilla
(      ) 4. A. find                    B. friend                           C. fruit
(      ) 5. A. fourteen             B. fifteen                           C. thirteen
(      ) 6. A. leg                    B. black                           C. long
(      ) 7. A. tail                    B. tall                           C. body
(      ) 8. A. is                    B. in                                  C. it
(      ) 9. A. are                    B. oranges                    C. apples
(      ) 10. A. grandma              B. grandmother             C. grandpa
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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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