学进去-教育应平等而普惠
试题
类型:用单词的正确形式完成短文
难度系数:0.65
所属科目:初中英语
根据短文内容,用方框中所给单词的正确形式填空,使短文完整正确。(每个词只能用一次,有两个多余词)
long, cloth, ton, third, off, develop, short, cause, up, rapid, into, whether

How to be green

We all need a healthy environment, but we produce waste every day, and it is harmful to our environment. Repeat these 1. words daily: reduce, reuse and recycle.

Reduce means “use less”. Do not waste things. It saves money and 2. less pollution. Do not order more food than you can finish. Turn 3. the lights when you do not need them. Before you buy something new, think 4. it is really necessary because maybe the old one is just as good!

Reuse means “use again”. Use things for as 5. as possible. Look after them so that they will last. Repair them if possible. Do not throw them away and buy new ones. Do not use paper cups or paper bags. It is better to use china cups and 6. bags because they can be used many times.

Recycle means “change things into something else to be reused”. Although it takes energy to change things 7. something else, it is better than throwing things away or burning them. We throw 8. of rubbish away each year, and we have to make a change. Divide your rubbish into plastic, glass, paper and rubber. 9. a recycling policy for the whole community. Buy products such as recycled paper to help save trees.

We cannot hope for 10. change, but let’s take these simple steps today so that we will save the world for our grandsons and granddaughters tomorrow.

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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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