man woman boy的复数是多少
题目
man woman boy的复数是多少
还有pencil apple banana boat coat bike bird class bus box egg bike desk tree cake teacher child
答案
men women boys pencils apples bananas boats bikes birds
classes buses boxes eggs desks trees cakes teachers
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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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