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,根据所听句子,选出听到的单词。
(     ) 1. A. usually                     B. often                      C. before
(     ) 2. A. Tuesday                 B. Thursday                 C. Friday
(     ) 3. A. lesson                       B. listen                       C. lessons
(     ) 4. A. lake                       B. make                       C. cake
(     ) 5. A. Music                       B. Maths                       C. Science
(     ) 6. A. boat                       B. coat                       C. bed
(     ) 7. A. friend                     B. fruit                       C. flowers
(     ) 8. A. 5:40                       B. 4:50                       C. 4:40
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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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