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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

Computers

Computers are changing our life. You can do a lot of things with a computer, such as, writing articles (文章), watching videos, playing games and doing office work. But the most important use of computer is to access the internet. We don't need to leave home to borrow books from a library or to do shopping in a supermarket.

Computers enable us to have a more convenient(便利的) life.

1.Computers are changing our life. (     )
2.You can do a lot of things with a computer. (     )
3.You can use a computer to do your homework and office work. (     )
4.We must leave home to borrow books from a library or to do shopping in a supermarket. (     )
5.Computers enable us to have a more convenient life. (     )
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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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