求英语口语作文简单的2分钟左右
题目
求英语口语作文简单的2分钟左右
答案
Nowadays people are not so sure about the things they eat.In the past few years ,it was revealed(揭露) again and again that the things we ate were actually harmful to our health:milk powder for infants ,Cooking Oil,etc.What can we ordinary people do to protect ourselves?Should we all become scientists and examine all the things we buy before eating them?I think it's responsibility(责任) of the goverment ,Some measures must be taken to end all this.
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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