We know that everything she wrote was true even though some of it( )second handinformation
题目
We know that everything she wrote was true even though some of it( )second handinformation
A was Bhad been为什么选A
答案
它是第二手资料,it is second hand information,换成过去是就是把is改成was
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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