求一篇英语作文、题目How to keep safe on the steets大神们帮帮忙
题目
求一篇英语作文、题目How to keep safe on the steets大神们帮帮忙
答案
In our community,we often walk,bike,go to school.But how do we keep ourselves safe?If we ride a bike,don't obey the traffic rules,if cross the road,do not obey the traffic rules,we may cause any accid...
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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