be young free warriors作文范文
One possible version:In order to support Beijing to hold the 20XX Olympic Games and protect our environment,an activity was organized by the Young League and Student's Union of our school during the week from June 3rd to June 8th.All the students in the senior grades took active part in it.
演员舒畅Some students cleaned the playground,watered the young trees and flowers,and removed weeds.Some students collected waste paper,old books,empty cans and old toys.They had them sorted and sent them to the recycling center.The activity is really instructive.Now we all have realized how important protecting the environment is.于波蔡少芬
Trees can be damaged or killed by a wide variety of construction activities.Some practices lead to obvious injuries such as broken branches or torn bark.Open wounds of this type deplete a plant's energy resources and provide entry points for insects,or for diseases such as oak wilt.
咸鱼茄子煲
The worst damage,however,often remains hidden underground.
龙虾的做法
Roots are one of the most vital parts of a tree.They are responsible for nutrient and water uptake,store energy,and anchor the plant.Because they are so important,it is critical that you protect roots that lie in the path of construction.
网上订火车票怎么订Trees are never the same shape below ground as they are above,so it is difficult to predict the length or location of their roots.Typically, however,approximately 90-95 percent of a tree's root system is in the top three feet of soil,and more than half is in the top one foot.The part of this root system in which construction damage should be avoided is called the protected root zone（PRZ）。
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