学进去-教育应平等而普惠
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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,选出你听到的选项。每小题读两遍。
( ) 1. A. A                    B. H                           C. L
( ) 2. A. ear             B. eye                    C. eraser
( ) 3. A. OK             B. red                    C. leg
( ) 4. A. white             B. blue                    C. yellow
( ) 5. A. foot             B. face                    C. nose
( ) 6. A Miss             B. mum                    C. mouth
( ) 7. A. hi                    B. hand                    C. great
( ) 8. A. body             B. book                    C. black
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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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