十道各种时态的动词填空题.（英语）
题目
十道各种时态的动词填空题.（英语）
答案
im homeim watching tvi finished my homework at schooli won't read my textbooks until my parents are back.i was reading those books while other students were having fun.i have been good.i will be helpi...
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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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