To sleep at least eight hours every day is very necessary for the students 同义句改写2种
题目
To sleep at least eight hours every day is very necessary for the students 同义句改写2种
it's very —— —— the students —— —— at least eight hours every day
it's very —— —— the students —— at least eight hours every day
答案
necessary for to sleep
necessary for sleep
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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