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. wash                                 B. sweet                           C. salad
(     ) 2. A. tea                                 B. eat                                 C. read
(     ) 3. A. cat                                 B. hot                                 C. old
(     ) 4. A. funny                                 B. fresh                           C. friend
(     ) 5. A. helpful                           B. Friday                           C. healthy
(     ) 6. A. Sunday                           B. Wednesday                    C. Saturday
(     ) 7. A. weekend                           B. sandwich                     C. hamburger
(     ) 8. A. delicious                           B. Thursday                    C. Homework
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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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