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 Mike. My sister and I are helpful at home. We can help my mother. I can empty the trash and water the flowers. I can cook the meals and boil (烧) the water. My sister can clean the bedroom, sweep the floor. She can also make some tea. She can clean the windows, too.

1.Mike with his sister can help his mother. (     )
2.Mike can cook the meals and empty the trash. (     )
3.Mike can’t boil the water. (     )
4.Mike’s sister can clean the windows. (     )
5.My sister can’t make some tea. (     )
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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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