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

Our environment is becoming worse and worse. What can we do for the environment? I think each of us can do a little to help.

The first thing we can do is to use cloth bags instead of plastic bags when we go shopping. I help to protect the environment. The second thing we can do is to reuse old textbooks. Then we should also never forget to turn off lights when we leave rooms in order to save energy. What's more, it would be better if we walk or ride a bike to school. And we can use both sides of paper when we write. We should try our best to reduce pollution and waste.

1.Our environment is becoming worse and worse. We should do something to protect it. (     )
2.Each of us can do a little to help. (     )
3.We'd better use plastic bags when we go shopping. (     )
4.We should also never forget to turn off lights when we leave rooms to save energy. (     )
5.We should try our best to reduce pollution and waste. (     )
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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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