英语练习速度回答
题目
英语练习速度回答
He can ride a bike to school now.(改成同义句）He ___ ___ ____ ride a bike to school now.To be careful with electricity is important .(改成同义句)It ___ ___ ____be careful with eletricity.His grandfather could lift the heary lock in the past.(对划线部分提问）_____ _____his grandfather ______ in the past?划线部分是 lift the heary lock
答案
is able to
is important to
What could do
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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