学进去-教育应平等而普惠
试题
类型:单选题
难度系数:0.65
所属科目:小学英语
Read and choose.(读单词,选出不同类的一项。)
(      )1.A. ruler                    B. pencil                           C. bike
(      )2.A. boat                    B. your                           C. my
(      )3.A. car                    B. desk                           C. bike
(      )4.A. pear                    B. cat                           C. banana
(      )5.A. grape              B. watermelon                    C. box
(      )6.A. brother              B. chair                           C. sister
(      )7.A. nine                    B. ten                           C. zoo
(      )8.A. desk                    B. boy                           C. girl
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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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