学进去-教育应平等而普惠
试题
类型:单选题
难度系数:0.94
所属科目:小学英语
找出划线部分发音与其他三项不同的一项。
(     ) 1.A. snow                 B. snowy                   C. down                    D. yellow
(     ) 2.A. slow                   B. now                        C. how                     D. wow
(     ) 3. A. cow                   B. flower                    C. snow                      D. brown
(     ) 4.A. window             B. grow                      C. tomorrow               D. now
(     ) 5.A.cow                    B. yellow                   C. show                      D. know
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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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