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,选出你所听到的单词。
(     ) 1. A. light             B. let                      C. library
(     ) 2. A. classroom            B. bathroom               C. bedroom
(     ) 3. A. sister             B. father             C. mother
(     ) 4. A. wall             B. window               C. yellow
(     ) 5. A. inside       B. outside            C. time
(     ) 6. A. forty            B. thirty               C. fifty
(     ) 7. A. cool             B. cold                      C. cloudy
(     ) 8. A. near             B. next                    C. next to
(     ) 9. A. computer room     B. classroom                  C. art room
(     ) 10. A. put on     B. take off               C. read a book
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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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