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
听五组小对话,根据对话内容选择正确的选项。
(     ) 1. The river is about ______ kilometres long.
A. 500       B. 5,000       C. 50,000       
(     ) 2. This is a stamp from ______.
A. Japan       B. England       C. China       
(     ) 3. Li Ming can speak ______.
A. English       B. French       C. Japanese(日语)
(     ) 4. Lily’s friend is from ______.
A. Japan       B. China       C. the UK       
(     ) 5. Amy’s favourite festival is ______.   
A. Thanksgiving Day       B. New Year’s Day       C. Christmas
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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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