With a lot of difficult problems( ),the manager felt woeeyied all the time.
题目
With a lot of difficult problems( ),the manager felt woeeyied all the time.
答案
to be settled
用动词不定式的被动语态,表示将来、被动
句意:还有许多难题未被解决,经理一直忧心忡忡的.
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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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