wear ,put on,be in,with有什么区别
题目
wear ,put on,be in,with有什么区别
答案
wear 和 be in 强调穿戴的状况He is wearing his new jacket.He is now in white.Do you know the girl in red?put on 强调动作Just put on your clothes quickly.with 也是强调状况,但一般引出一个介词短语作后置定...
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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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