学进去-教育应平等而普惠
试题
类型:音标题
难度系数:0.94
所属科目:小学英语
辨音,选出于其余三个不同的选项。
(______) 1. A. bread           B. head           C. clean               D. sweater
(______) 2. A. look           B. book           C. food               D. foot
(______) 3. A. bin            B. sign           C. pick               D. litter
(______) 4. A. liked           B. jumped       C. lived               D. picked
(______) 5. A. year          B. hear            C. pear              D. near
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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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