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:0.65
所属科目:小学英语
听录音,选出你所听到的单词或词组。
(     ) 1. A. forest       B. front        C. from
(     ) 2. A. behind             B. beside       C. be
(     ) 3. A. wing             B. swing       C. swim
(     ) 4. A. computer room       B. art room       C. classroom
(     ) 5. A. fingers       B. floors       C. friends
(     ) 6. A. hole              B. ice       C. idea
(     ) 7. A. body             B. arms       C. legs
(     ) 8. A. just now       B. all right       C. just right
(     ) 9. A. like reading       B. like singing       C. like dancing
(     ) 10. A. cold and wet       B. thirsty and hungry        C. tired and hungry
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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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