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
听小短文,选出正确的选项。(小短文读三遍)
(       ) 1. It’s eight o’clock in the _______.
A. morning        B. evening        C. weekend
(       ) 2. Jim is ________.
A. 11 years old        B. writing a letter        C. reading a storybook
(       ) 3. Kate is ________.
A. singing songs        B. sleeping        C. playing with toys
(       ) 4. ________ is playing with a ball.
A. Jim’s sister        B. Jim          C. The cat
(       ) 5. There are ________ people in Jim’s family.
A. six        B. four        C. five
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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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