求英语作文electricity in our life(100字左右)
题目
求英语作文electricity in our life(100字左右)
答案
As is known to all,electricity plays an important role in our life today.Electricity brings a lot of convenience to our life.It motivates the washing machine ,which helps us a lot with our housework.It makes the computer working,which aids us to obtain a lot of information from the internet.What's more ,without electricity,there can't be so many lights at night.We cannot do our homework in the light of a lamp.The city cannot be so beautiful without the decorations of the lights.Thus,it is obvious that electricity is so important in our life that we can hardly live regularly without it.
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.
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