There are four s__in a year:spring,summer,autumn and w___.Spring is the first season o___this year.W
题目
There are four s__in a year:spring,summer,autumn and w___.Spring is the first season o___this year.When spring comes,the weather is warmer and the days get l____.It often r___.I like spring best.
答案
seasons
winter
of
longer
rains
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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