学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听小对话,根据对话内容选择最佳选项。
(     )1. My picture is ________ the window.     
A. on                                   B. near                                        C. under
(     )2. The schoolbag is ________.   
A. black and brown                  B. brown and blue                         C. black and blue
(     )3. My friend is ________.
A. thin and friendly                 B. tall and thin                              C. tall and friendly
(     )4. It’s ________ in the hand.
A. a ruler                              B. an eraser                                   C. a pen
(     )5. We have ________ lights in our classroom.       
A. eight                                  B. seven                                     C. a
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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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