can be easily made to demonstrate英语作文
来源:才华咖 本文已影响2.65W人
来源:才华咖 本文已影响2.65W人
A “solar still” can be easily made to demonstrate that there is often water in even the driest places. we can collect water with little more than a sheet of plastic and a container.
We first dig a hole several feet deep in the ground and place a container at its center. put as much green living plant material as you can find around the container. grass, tree leaves and other plants all contain water. in the day time the sun causes water in the plants to evaporate.
Place the plastic film over the hole using stones to keep it in place as the diagram shows. leaving a dip in the center, the plants’ water will condense on the inside of the plastic and will drip into the container. we can also collect early morning dew in the center of the dip too.
Evaporation is the name of the process when water turns from a liquid into a gas. condensation is the process when water turns from a gas to a liquid.
MS SQL Server Management Studio Express安装图文具体步骤
I want to be a headmaster英语作文
At Climate Summit, Hope for Emissions Deal美文欣赏
Too many essential for children to learn英语作文
The relationship between theory and practice大学英语作文
VOA的慢速英语听力文摘:Mystery at The Ice Castle Inn
Modern Technology Makes Life More Conv英语六级作文
Jolie drops battle over perfume named Shilohy英语作文
最新《Fate/Stay Night Unlimited Blade Works》经典名句
八年级英语下册Unit 6 An old man tried to move a Mountain period one说课稿
World Day to Combat Desertification大学英语作文
Equal Rights between Men and Women高中英语作文
托福英语写作范文:Examinations exert a pernicious influence on educat
人教PEP版小学五年级英语下册Unit3Myschoolcalender.ALet’stalk
托福口语真题解析: About spare time and money
英语语法be to和be going to
RemarksofPresidentBarackObama优秀英语作文
Self Recommendation Letter英文自荐信
英语材料阅读:with mental and physical disorders
A Letter of Recommendation英语四级作文
英语老师演讲稿 How to Be a Good English Teacher
Ancient Human Ancestors Heard Differently赏析
英语作文Sustainable Development
The mountains the most beautiful female teachers英语作文
Cortana makes a timid debut in Skype
A letter to my English teache英语作文
US Farmers Want to End Cuba Trade Embargo美文欣赏
A Letter to Univsity Pesident about the Canteen Service on C
SustainableDevelopment高中英语作文
是求职还是考研 to be or not to be
To Be a Good Talker and Listener初中英语作文
Advantages of Being a Teacher英语作文
I want to be a headmaster优秀作文
九年级《unit 6 I like music that I can dance to. Period2》评课稿
《The Prevalence of Western Holidays》英语四级作文
初中英语阅读训练International Mens Day
to be made是什么时态
六年级英语上册Unit2 New York is in the east of America说课稿
四级作文:Create a Conservation-Oriented Campus
奥运英语作文:中国跳水队(Diving into Gold: Chinas Dream Team