关于环境的英语演讲稿,大概两到三分钟!
题目
关于环境的英语演讲稿,大概两到三分钟!
答案
Water is the source of life
Earth looks like a big blue marble; from high above the Earth and from the moon, the planet gleams and shines. The blue water in the oceans and seas of the Earth makes a dramatic image.Water is the source of this beauty and the source of life on Earth. It is the reason people can live on this planet. Water is everywhere. Water is in rock deep under the ground, in natural holding areas.In a real sense, water keeps Earth alive.
The last drop of water will be the world's human tears. We Chinese are one of the 12 water-poor countries, as people waste, water less and less. However, there are many waste of water, for example: some of the children bought water gun filled with water shooting water everywhere; there are some students hand-washing after washing bowls, or not turn off the faucet, waste a lot of water... . Yunnan-Guizhou Plateau, where the recent prolongeddrought, making survival of the population there is facing a serious threat to address this problem, we in China 1.3 billion to develop awareness of water conservation. Therefore, I appeal to you here: "Take action at water savingStop earth mother from crying!
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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