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,将其代号填入括号里。
(     ) 1. A. cool                           B. class                           C. cold
(     ) 2. A. art                           B. hot                           C. get
(     ) 3. A. ball                           B. wall                           C. tall
(     ) 4. A. meet                           B. mother                    C. music
(     ) 5. A. first                           B. forty                           C. light
(     ) 6. A. rainy                           B. cloudy                    C. snowy
(     ) 7. A. sun                           B. sunny                    C. Sunday
(     ) 8. A. second                    B. office                           C. floor
(     ) 9. A. warm                    B. water                           C. windy
(     ) 10. A. library                    B. breakfast                    C. computer
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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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