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
Listen and choose. 听短文,选择正确的选项,将序号填入括号内
(      ) 1. Daming and Sam saw ___________ yesterday.
A. Buckingham Palace               B. the Great Wall
(      ) 2. They _________ a long, long way.
A. walked                 B. ran
(      ) 3. It took them _________ minutes to climb to the top.
A. 15                       B. 50
(      ) 4. They ate a cake, apples and _________ there.
A. biscuits                 B. chocolates
(      ) 5. They bought a _________ for mum.
A. picture                 B. postcard
(      ) 6. This letter is from _________.
A. Lingling               B. Sam
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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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