关于the science of food 的文章,
题目
关于the science of food 的文章,
是板报素材
答案
我背过一篇相关的文章.恁记忆,看能写出多少来.
The food we eat seems to have profound effects on our health. People of certain cultures are susceptible to certain illnesses because of the food that is characteristic in their culture. In 1945, researchers found nitrates and other food additives caused cancer. Farmers use drugs not only to cure animals,but also intend to fatten the aminal in order to obtain a good price on the market.
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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