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或短语。
(       ) 1. A. maths book            B. Chinese book             C. maths
(       ) 2. A. toy                       B. key                         C. candy
(       ) 3. A. desk                      B. door                       C. floor
(       ) 4. A. picture                    B. teacher                    C. computer
(       ) 5. A. wall                      B. full                           C. pull   
(       ) 6. A. has                      B. her                              C. his
(       ) 7. A. what                      B. where                       C. who
(       ) 8. A. on the wall            B. in the box                  C. near the table
(       ) 9. A. under the book        B. under the desk               C. under the schoolbag
(       ) 10. A. put away               B. take out                       C. pull up
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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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