It will take us about four hours ——（get）there by bus.It‘s cold in the room and
题目
It will take us about four hours ——（get）there by bus.It‘s cold in the room and
I have to wear a thick jacket __(keep)myself warm.Kitty is one of the ___(one)students to join the club.The students are very ____(excite)about their coming school trip.
顺便讲解how long 和how soon不同之处和语法上用法，
答案
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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