At one time we had about eight people here who did nothing but__into family history 为什么填researc
题目
At one time we had about eight people here who did nothing but__into family history 为什么填researc
如果填researching行吗?
答案
do nothing but doing sth 除了做某事,其他什么都没做.应该是对的吧
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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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