介紹水的英語(yǔ)課前演講稿（精選7篇）
介紹水的英語(yǔ)課前演講稿 篇1
water is very important for living things. without water there can be no life on earth. all animals and plants need water. man also needs water.
water is found atmosteverywhere. even in the driest part of the world there is some water in the air.
as we all have found out, water may be a solid, or a liquid or a gas.when it isa solid, it may be as hard as brick, when itis a liquid, you can pour it out of a container. when it is a gas, you cannot see or feel it.
although about 70 percent of the earth's surface is covered with water,there are many places in the world still running out of water. so we should make good use of water on earth.
介紹水的英語(yǔ)課前演講稿 篇2
Saving WaterThe world is not only hungry,but also thirsty for water. This may seem strange to you, since nearly 75 % of the earth's surface is covered with water. But about 97% of this huge amount is sea water, or salt water.
Man can only drink and use the other 3% -- the fresh water that comes from rivers, lakes,underground, and other sources. And we cannot even use all of that, because some of it is in the form of icebergs and glaciers. Even worse, some of it has been polluted.However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us.
But our need for water is increasing rapidly-- almost day by day. Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on. A limited water supply would have a bad effect on agriculture and industry. Let me give you just one small exampie of how necessary water is to industry. Did you know that to produce a single ton of steel, it takes about 91, 000 liters of water?We all have to learn how to stop wasting our precious water.
One of the first steps we should take is to develop ways of reusing it. Experiments have already been done in this field, but only on a small scale. For us, the systems are as important as the spacecraft.
介紹水的英語(yǔ)課前演講稿 篇3
Everyone has a yone's dream is aps we are keen to fly, their ability to be able to rely on an out of the aps we are keen to dance in this short life left in fond life only once, we should cherish ine was no longer in your life do you want to ough we are still students, are studying, but we should be ahead of our future planning to asked his high school What to do after graduation?
Do you have to ask ourselves, What is the dream? Do you know what to do and learn? From that moment on, you ask yourself e then, you may struggle with the goal, maybe you have this program, maybe you should know how to cherish that case, you will not waste his life !
介紹水的英語(yǔ)課前演講稿 篇4
Lost time is never found again. This is something which I learned very clearly last semester. I spent so much time fooling around that my grades began to suffer. I finally realized that something had to be done. It was time for a change.
Now I have a new plan for using my time wisely. I have set my alarm clock ahead half an hour. This will give me a head start on the day. I have also decided to keep a log of what I do and when I do it. Looking back on what I’ve done will give me some ideas on how to reorganize my time.
失去的時(shí)間再也找不到。這是我上學(xué)期學(xué)的很清楚的東西。我花了這么多的時(shí)間在愚弄，我的成績(jī)開(kāi)始受到。我終于意識(shí)到必須要做的事情。這是一個(gè)改變的時(shí)候。
現(xiàn)在我有一個(gè)明智的利用我的`時(shí)間的新計(jì)劃。我已經(jīng)把鬧鐘提前半小時(shí)了。這將給我一個(gè)頭一天開(kāi)始。我也決定保持一個(gè)日志，我做什么，當(dāng)我這樣做�；仡櫸宜龅氖虑闀�(huì)給我一些關(guān)于如何重新安排我的時(shí)間的想法。
介紹水的英語(yǔ)課前演講稿 篇5
Good afternoon,my dear friends.
I am very happy to meet you here.It is my great honor to municate with youat such a special occation.First of all,please allow me to express myappreciation to you all to listion to me.
I am proud of being a college student.The collegelife is fresh,newteachers,new classmates and new friends. I like the friendship,and their wideknowledge and opening mind. The grand library,school buildings and wideplayground attrattde me very much.My college life is better than I expected,Ican do anything I like. In the college we can not only learn the professionalknowledge,but also develop our prehensive abilities.If we can make full use ofthe period,we can learn many useful things.Besides,we should have the activeattitude to our life,do a contributionto the society.Collegelife is the mostprecious time in our life.Most of us want to bee an outstanding man. But thereare some students still waste their time. They get together for eating,drinkingor playing cards. They're busy in searching for a girlfriend or a boyfriend.They pletely forget their task as college students.
Finally,I hope everybody can try their best to bee a worthy person to ourcountry,and make great contributions to the society!
介紹水的英語(yǔ)課前演講稿 篇6
Most people would like to be popular with others,but not everyone canachieve this goal. What is the secret to popularity? In fact,it is very simple.The first step is to improve our appearance. We should always make sure that westay in good shape and dress well.
When we are healthy and well'groomed,we will not only look better but alsofeel better. In addition,we should smile and appear friendly. After all,ourfacial expression is an important part of our appearance. If we can do this,people will be attracted to our good looks and impressed by our confidence.
Another important step is developing more consideration for others. Weshould always put others first and place their interests before our own. It'salso important to be good listeners; in this way people will feel fortableenough to confide in us. However,no matter what we do,we must not gossip.
Above all,we must remember to be ourselves,not phonies. Only by beingsincere and respectful of others can we earn their respect. If we can do all ofthe above,I am sure popularity will e our way.
介紹水的英語(yǔ)課前演講稿 篇7
I like all kinds of outdoor sports.Such as playing table tennis,basketball,climbing the mountains,travelling,reading books and so on.
Of all the hobbies,I like traveling best.I often go to other provinces with my parents during the holiday.Last year we went to Emei and visited Yunan Provice.I can learn different culture and peole when I travel.I can taste lots of local food,too.
on weeks I like playing basketball with my father or my fris.When I play basketball,I forget all my worries and it can make me happy and keep fit.I want to be a basketball star like Yaoming.
Hobbies are very inportand in our lives.When I am free,I like reading books.I get lots of knowledge them.Books are like my good fris.