牛津英语7B
题目
牛津英语7B
7B electricity today的课文内容
答案
Electricity is very important to us.I'm going to show video.It will tell you a lot about electricity.Great!Hurray!On a dark night,when the lightning flashes,what do you see?On a dark night,when the thunder crashes,what do you see?Electricity!
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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