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

Mobile phones help us keep in touch with each other. Fridges keep food cool and fresh. TVs make our lives fun. But they can get old and become e-waste as time goes by. E-waste is bad for earth. It can pollute the soil and water. It can make people sick. It can also catch fire. How can you deal with e-waste? Recycling: You can give it to a recycling center. Selling: You can sell it in a second-hand market. Some people like to use older, cheaper things. Donating: You can give it to someone in need for free.

1.This passage tells about _________. (        )
A.mobile phonesB.fridgesC.e-waste
2.E-waste is bad for us because it can _________. (        )
A.make us healthyB.catch fireC.clean water and soil
3.There are _________ ways to deal with e-waste according to the passage. (        )
A.threeB.fourC.five
4.People can buy old and cheap things in a _________. (        )
A.shopping mallB.supermarketC.second-hand market
5.To deal with e-waste, you can give it to somebody for free by _________. (        )
A.recyclingB.sellingC.donating
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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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