英语单词翻译forward-backward glasses
题目
英语单词翻译forward-backward glasses
答案
Do your friends sometimes come up behind you and make you jump?Do cars come around the corner when you try to cross the road?Well,you can solve that problem with these modern "Forward-backward Glasses".Look forward with the right eye and back with the left.
如果按照这段话来理解的话就是“既能看见前面也能看见后面的眼镜”（360度全方位眼镜）
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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