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
Listen and choose. (听录音,选出你所听到的单词。)
(     ) 1. A. classroom                       B. class                          C. blackboard
(     ) 2. A. pencil                              B. candies                          C. candy
(     ) 3. A. green                               B. glasses                          C. class
(     ) 4. A. kitchen                           B. chicken                          C. study
(     ) 5. A. milk                               B. drink                           C. juice
(     ) 6. A. father                         B. friendly                           C. friends
(     ) 7. A. they             B. their                           C. tall
(     ) 8. A. picture                            B. door                         C. window
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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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