Researchers began dealing with the problem in 2000.They found that over a period of six years,planting three rows of trees reduced total dust and ammonia by more than half.And they found that smells were reduced by 18%.
Farmers may think trees will take too long to grow and be effective.But some trees can grow quickly.At least one-third of the Delmarva farms have planted trees,technically known as vegetative environmental buffers.The idea offers a way to cut pollution,save money and energy,and make the neighbors happy.
1.How does the new ventilation system work?(No more than 7 words)
________________________________________________________________________
2.What is the maximum capacity of poultry farms in Delmarva?(No more than 2 words)
________________________________________________________________________
3.What are the benefits planting trees can bring about?(No more than 11 words)
________________________________________________________________________
4.What is the best title of the passage?(No more than 10 words)
________________________________________________________________________
课后达标检测21
Ⅰ.单项填空
1.解析:选A。let out“泄露;一不留神说出”;take care“注意;小心”;make sure“确信;证实”;make out“辨认出来”。
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