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,选出你听到的单词或词组。
(       ) 1. A. first                           B. fourth                    C. fifth
(       ) 2. A. usually                    B. sometimes             C. always
(       ) 3. A. walk                           B. work                    C. win
(       ) 4. A. July                           B. June                    C. January
(       ) 5. A. Spain                    B. Canadian             C. Spanish
(       ) 6. A. plate                           B. please                    C. play
(       ) 7. A. green                    B. grow                    C. grapes
(       ) 8. A. take turns                    B. talk quietly             C. go shopping
(       ) 9. A. eat dinner                    B. eat lunch             C. eat breakfast
(       ) 10. A. good job                    B. each other             C. have a look
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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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