he says Edison inwented the light bulb in the 19th century 改为主动句或被动句
题目
he says Edison inwented the light bulb in the 19th century 改为主动句或被动句
答案
He says the light bulb was invented by Edison in the 19th century.
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
最新试题
热门考点