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
听单词,选出你所听到的单词。每个单词读三遍。
(     ) 1. A. am                                        B. are
(     ) 2. A. ear                                        B. eye
(     ) 3. A. door                                      B. desk
(     ) 4. A. blue                                      B. black
(     ) 5. A. seven                                     B. eleven
(     ) 6. A. pen                                        B. pencil
(     ) 7. A. school                                     B. schoolbag
(     ) 8. A. no                                          B. not
(     ) 9. A. father                                     B. mother
(     ) 10. A. head                                     B. hand
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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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