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:0.85
所属科目:小学英语
听录音,选择你所听到的字母或单词,把它的编号写在括号里,读两遍。
(      ) 1. A. I                                B. L
(      ) 2. A. d                                B. b
(      ) 3. A. E                                B. F
(      ) 4. A. Hi.                              B. Bye
(      ) 5. A. ear                              B. eye
(      ) 6. A. book                           B. foot
(      ) 7. A. arm                            B. my
(      ) 8. A. red                              B. leg
(      ) 9. A. Colour it red.                 B. Colour it black.
(      ) 10. A. Open your bag.            B. Open your book.
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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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