学进去-教育应平等而普惠
试题
类型:任务型阅读
难度系数:0.65
所属科目:小学英语

Hello! I'm Jenny. I'm ten years old. I am in Class 3, Grade 4 in a primary school in Beijing. I have some good friends in my class. Lily is an English girl. She is Lovely. Peter is from Canada. He lives in Ottawa. Jim is from the U. S. He likes playing soccer. We often play together (一起) happily.

1.Jenny is nine years old. (      )
2.Lily is from Britain. (      )
3.Peter lives in Ottawa. (      )
4.Jim likes playing basketball. (      )
5.Jenny is in China. (      )
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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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