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. there                   B. their                   C. they’re
______) 2. A. horses                   B. houses                   C. holes
______) 3. A. bear                   B. pear                   C. tail
______) 4. A. wings                   B. arms                   C. legs
______) 5. A. short ears               B. a short tail               C. soft hair
______) 6. A. in the new school       B. a new student           C. in the school
______) 7. A. in the box               B. in the fridge           C. in the kitchen
______) 8. A. an animal friend           B. have an animal           C. have a friend
______) 9. A. their hobby               B. their hobbies           C. have some hobbies
______) 10. A. a lot of               B. lots of                   C. a lot
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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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