横线里填什么单词?
题目
横线里填什么单词?
Mike is now _inbeijing.he is _ Australian boy.Mike _collecting(收集）stamps(邮票）.he _ a lot of chinese stamps.Mike is learning Chinese.He can remember(记住）about five _ Chinese words.And he can even write _ Chinese now.He also _ many friends.Every year,his parents _ to see him.
答案
living an likes has hundred in has come
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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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