学进去-教育应平等而普惠
试题
类型:听力题
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,听两遍。
(      ) 1. A. back        B. bag        C. black
(      ) 2. A. day        B. draw        C. do
(      ) 3. A. very        B. every        C. easy
(      ) 4. A. Thursday        B. Saturday        C. Tuesday
(      ) 5. A. match        B. much        C. watch
(      ) 6. A. milk        B. Mike        C. Maths
(      ) 7. A. these        B. this       C. them
(      ) 8. A. 5: 40       B. 4: 50       C. 4: 40
(      ) 9. A. sun        B. sunny        C. fun
(      ) 10. A. wake up        B. get up        C. stand up
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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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