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,选出你所听到的内容,听两遍。
(     ) 1. A. large                     B. laugh                    C. loud
(     ) 2. A. weak                    B. wake                    C. week
(     ) 3. A. coal                     B. cold                     C. cola
(     ) 4. A. mouse                    B. mouth                 C. month
(     ) 5. A. balloons            B. brought                    C. bought
(     ) 6. A. Australian                 B. Australia              C. Australians
(     ) 7. A. plan                    B. plane                    C. play
(     ) 8. A. travel                    B. traveller               C. travelling   
(     ) 9. A. turn into                  B. pour ... into              C. take ... into
(     ) 10. A. a zebra crossing                 B. a pavement        C. the traffic lights
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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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