以“why is it important to protect our environment?”为主题写一篇3分钟的演讲稿,紧扣主题,内容完整.
题目
以“why is it important to protect our environment?”为主题写一篇3分钟的演讲稿,紧扣主题,内容完整.
答案
The world we live in is becoming more and more intolerable because of environmental destruction.For example ,forest destruction results in decrease of planting land and unpleasant weather.In addition,man is faced with problems of water pollution and air pollution.
A lot of measures have been taken.Planting trees helps improve and beautify the environment.Besides,laws concerning environmental protection have been put into effect and achieved good results.
However,the problem of environmental protection remains far from being solved.On the one hand,the environment pollution and destruction are getting worse and worse in the modern world.On the other hand,the lack of knowledge about the importance of protecting environment hinders the solving of the problem.In a word,there is a long way to go before we enjoy a clean and comfortable world.
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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