学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.65
所属科目:小学英语
从方框中选择合适的选项, 补全对话
A. in     B. or     C. from     D. koalas     E. Yes
Sam:I've got some phone friends. But I also want a pen friend.
Amy:Which country do you want a pen pal 1.1.?
Sam:I want a pen friend from China 2.2. from France. Because I want write 3.3.Chinese or French. Do you want a pen friend?
Amy:4.4., I do. I want a pen friend from Australia. Because I want to go there to see 5.5.and kangaroos. They are very lovely.
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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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